Biomechanics Research Project in the IAAF
World Championships Daegu 2011

Biomechanics Research Project in the IAAF
World Championships Daegu 2011

INDEX
1. Biomechanics Analysis of Men’s 100 Meters Sprint during IAAF World
13
Championships Daegu 2011
2. Sprinting Characteristics of Women's 100 Meters Sprint at the IAAF World
24
Championships Daegu 2011th

3. 13 IAAF World Championships Daegu 2011 - Final Report Men's Pole
Vaulting
33
th

4. 13 IAAF World Championships Daegu 2011 - Final Report Women's Pole
40
Vaulting
5. High Jump Men - Biomechanics Research Report in the IAAF World
46
Championships Daegu 2011
6. High Jump Women - Biomechanics Research Report in the IAAF World
56
Championships Daegu 2011
7. Biomechanical Analysis of the Long Jump - Men’s Final

65

8. Biomechanical Analysis of the Long Jump - Women’s Final

73

9. Biomechanical Analysis of Triple Jump Men - Final

81

10. Biomechanical Analysis of Triple Jump Women - Final

91

11. Biomechanical Analysis of Shot Put men - Final

100

th

12. 13

IAAF World Championships in Athletics Daegu 2011112

13. Biomechanical Analysis of Javelin Throw Man - Final

119

14. Biomechanical Analysis of Javelin Throw Woman - Final

129

15. Daily Report139

Biomechanics Research Project Teamin the IAAF World Championships Daegu 2011
• Chief Director :Young-Sang Bae• Director :Eui-Hwan Kim · Jong-Jin Park · Young-Jin Park · Ji-Seon Ryu · Kyung-Ok Yi · Joong-Sook Lee
Kyung-Jeong Choi · Cheong-Hwan Oh · Sang-Yron Woo · Young-Tae Lim · Kyung-Il Lee
Woen-Sik Chae · Seung-Bum Park · Suk-Hoon Yoon · Jung-Sul Seo · Jae-Kyun Ryu
Yong-Woon Kim · Ho-Mook Kim · Sang-Kyoon Park

• Researchers :Nam-Hee Kim · Sung-Mo Kang · Ji-Eun Kang · Moon-Seok Kwon · Ho-Jong Kill · Gun-Su Kim
Ki-Man Kim · Dong-Soo Kim · Sung-Sup Kim · Sung-Jong Kim · Jong-Woo Kim · Joo-Yun Kim
Jin-Hyuk Kim · Chang-Eun Kim · Eae-Sam Kim · Hye-Lim Kim · Ki-Jung Nam · Si-Hyeon Ryu
Yong-Hyeon Park · Jung-Ho Park · Jae-Hee Bae · Eui-Su Shin · Hyung-Seung Ahn
Ung-Ryang Wi · Chang-Jin Yoon · Chung-Gul Yun · Jeong-Min Lee · Jeong-Tea Lee
Haeng-Seob Lee · Ik-Su Jeong · Sung-Bum Choi · Su-Nam Choi · Seul-Bi Choi · Sung-Hee Ha
Wan-Ki Hong · Won-Sup Hwang• International Cooperation Research Team(JAAF Biomechanics Team) :Ae Michiyoshi · Takashi Mochida · Hiroyuki Koyama · Koji Hoga-Miura
Kazuhito Shibayama · Kadono Hirosuke · Tanji Hiroki

Biomechanics Research Project at IAAF
World Championships in Athletics - Daegu• Director :Young-Sang Bae(Keimyung University, Korea) · Young-Jin Park(Kyunghee University, Korea) Jong-Jin
Park(Kyungsung University, Korea) · Joong-Sook Lee(Silla University, Korea) · Woen-Sik Chae
(Kyungpook National University, Korea) · Seung-Bum Park(Busan Economic Promotion Agency, Korea)

Sport Biomechanics Research Project at IAAF
World Championships Daegu 2011
Ⅰ. Introduction
The IAAF World Championships in Athletics is the greatest athletics championship game
held by the IAAF biennially. The first game was held in Helsinki in 1983. The championships
were held once 4 years until the Tokyo game, where after it has been held biennially. The
th

13

World Championships was successfully held in Daegu from August 27, 2011 to

September 4, 2011 (IAAF, 2011). Sport biomechanics analyses have been widely utilized invarious sports games. Various scientific analysis projects in vital dynamics, coaching anddevelopment areas using sport biomechanics were carried out at previous IAAF WorldChampionships(Hommel, 1987).
The sport biomechanics project started first in the 2nd World Championships at Italy in 1987
followed by the projects for 1988 Seoul Olimpic Games, 1993 Stuttgart, Germany WorldChampionships, 1995 Gothenburg, Sweden World Championships, 1997 Athens, Greece WorldChampionships, 1999 Sevilla, Spain World Championships, 2005 Helsinki, Finland WorldChampionships, 2007 Osaka, Japan World Championships, 2009 Berlin, Germany WorldChampionships and 2011 Daegu, Korea World Championships in more various sports.
Sport biomechanic researches on the discus were performed at 1987 Rome WorldChampionships (Moravec, Ruzicka, Susanka, Dostal, Kodejs & Nosek, 1988) and 1993
Stuttgart World Championships (Knicker, 1994) followed by research on the throwing at 1995
Gothenburg World Championships (Bartonietz, Best & Borgstrom, 1995) and on the 100 m,
200 m, 400 m, 110 m hurdles, 100 m hurdles, long jump, triple jump, high jump(men) andpole jump at 1997 Athens World Championships (Muller & Hommel, 1997). In 1999 Sevilla
World Championships, the two-dimensional video system was introduced for the 100 m, 400 m
and other sports researches (Ferro, Rivera, Pagola, Ferreruela, Martin & Rocandio, 2001).
Same researches were carried out for the 100 m, pole jump, high jump, triple jump andjavelin at 2005 Helsinki World Championships (Masatoshi, Satoru, Masaki, Juha, Pavo & Akira,2006). In 2007 Osaka World Championships, the researches were carried out by Osaka
University of Health and Sport Sciences, and various researches were carried out in 2009
Berlin World Championships (Hommel, 2009).
About 3,500 athletes and athletic officials including world record holders and Olympic
medalists from 212 countries attended the Daegu World Championships to see who is the realworld champion (Lee, 2010). 1,046 male and 899 female athletes representing 202 countries

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finally competed to attract worldwide attention in the brilliant spotlights in the Championships.
At the same time, scientific sport biomechanics researches were carried out by Korean Societyof Sport Biomechanics under the support of the IAAF to generate scientific data of major
athletic sports.
Domestic researches on the athletic sports by kinematics and biomechanics have been
continuously carried out in various forms such as the researches related to starting elementsin the 100-meter sprint including the variations of strides, starting methods and starting,records and response time, ground reaction forces, the effect of flexibility to the speed and theelectromyogram at starting, and the researches on the sectional speeds in the 100 m (Ko,
1984) and the speeds at 30 m - 40 m section and 80 m - 90 m section (Eun, Chung & Bae,
1996; Jung & Lee, 1996). In other area of athletics, Lee and Ryu(2007) performed theanalysis of variables of the 3rdhurdling motions of domestic and foreign elite 110 m hurdlers;Ryoo(2003) and Kim(2010) performed the researches on the pole jump; Lee, Back andKim(2006) on the high jump; Bae(1994), Ko(2009), Lee, Min & Son(1994), Park, Kim &Ryu(2004), and Sung, Ryu & Lee(2003) on the run-ups and take-offs on the long jump;
Ryu(2005), Ryu & Yoon(2001) and Yu(1999) on the triple jump; Jeong(2004), Ryu, Pak &Kim(2011) on the shop-put; and Kim(2003), Lee, Kim & Lee(2000) and Kim(1993) on the
javelin. Korean athletes have not achieved the remarkable success in athletics except for the
marathon, even in Asian Games where almost no medal has been won (Korea Association of
Athletics Federations, 2007) and in 2011 Daegu World Championships as expected. Korea
was pleased, however, to see its athletes listed in the final rounds of the male and female
marathons, male and female 20 km walkings, male 50 km walking, male long jump, female
800 m wheel chair, and male 400 m wheel chair and to find new national records made in themale decathlon, male 1,600 m relay, male 400 m relay and male 50 km walking, which leaves
the future possibility of medal winning.
This study aims to identify the measures to perform biomechanics researches more
effectively to achieve better performance in the future athletics including the WorldChampionships and to find out about the roles of the research for development of Korean
athletics through analysing the process and results of the sport biomechanics research project
performed successfully during 2011 Daegu World Championships. In addition, through thesestudies, the bases of enhancement of Korean athlete's performance may be established, thecontinuous endeavor for the research of coaching technology and strategies may be caused,
and the measures to foster the development of Korean athletics and to promote people's
attention to the athletics can be sought.

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Ⅱ. Study Methods
The results of the sport biomechanics research projects of 2011 Daegu, 2005 Helsinki, 2007
Osaka and 2009 Berlin World Championships are analysed to establish better biomechanics
research methods. <Table 1> shows the list of events to which sport biomechanics analyses
are carried out and <Figure 1> shows the proceedings of the sport biomechanics research
project at the 2011 Daegu World Championships as introduced in the home page of the IAAF.
Table 1. Biomechanics Research Event in the IAAF World Championships Daegu 2011
GenderEventsTrack Events (2)

Men’s
(8)
Field Events (6)Track Events (2)Women’s(8)
Field Events (6)Sprints

100 m

Hurdles

110 mH

Jumps

Long Jump, High Jump, Triple Jump, Pole Vault

ThrowsJavelin Throw, Shot Put

Sprints

100 m

Hurdles

110 mH

Jumps

Long Jump, High Jump, Triple Jump, Pole Vault

ThrowsJavelin Throw, Shot Put,

Figure 1. The IAAF World Championships Daegu 2011 homepage

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Ⅲ. Results of the Research
1. Sport biomechanics research project at the 2011 Daegu World Championships
About 3,500 athletes and athletic officials, more than any attendants of previous WorldChampionships, from 212 countries attended the Daegu World Championships, and 1,046
male and 899 female athletes, 1,945 athletes in total, representing 202 countries competed forchampionships.
For more than a year, the planning activities were carried out after the first proposal for
sport biomechanics project was presented in Dec. 2009. Detailed implementation plan wasestablished, necessary organization was formed, the analysis team and the photography teamstarted practicing, and other preparation phase activities were carefully carried out after theapproval of the proposal by the IAAF in Jul. 2011.
Table 2. Biomechanics Research Project on the proceedings in the IAAF World Championships
Daegu 2011
Date

Proceeding

12. 2009.

2009 Autumn Conference of Korean Society of Sport Biomechanics
and Proposal of KSSB Biomechanics Research Project in the IAAF
WC Daegu 2011

3 ~ 4. 2010.
7. 2010.

Biomechanics Research Project T/F Team Received
th

11

th

IAAF World Championships in Athletics Osaka 2007 Report Received

8. 2010.

12

8. 2010.

2010 International Sports Science Congress and Biomechanics
Research Project T/F Team Confirmed

11. 2010.

Biomechanics Research Project Plan for Proposal

1 ~ 2. 2011.

IAAF World Championships in Athletics Berlin 2009 Report Received

Organizing Committee for the IAAF World Championships Daegu
2011, Korea Association of Athletics Federations and IAAF to submit a
proposal

4. 2011.

IAAF World Championships Daegu 2011 Workshop

5. 2011.

IAAF World Championships Daegu 2011 Rehearsal

5 ~ 7. 2011.

Biomechanics Research Project T/F Team Meeting

7. 2011.

IAAF Approved

8. 2011.

Extraordinary General Meeting andBiomechanics Research Project T/F Team Meeting
Biomechanics Research Project T/F Team Rehearse

8. 2011.

IAAF World Championships Daegu 2011 Start

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The Ministry of Culture, Sports and Tourism and the Korea Athletics Federation jointly
formed the sport biomechanics team for increasing athletic capabilities of the athletes,
respecting citizen's right to know, increasing viewing rate of mass media and responding theinterests and concerns of the IAAF, organizing committee of 2011 IAAF World Championships
and Korea Athletics Federation that regarded the sport biomechanics research as an important
tool for increasing athletic capabilities of the athletes and promoting peoples's participation inathletics. Owing to this cooperation, the project team smoothly and effectively implemented
systematic preparation including proper situation analyses. The joint research agreement madewith Japan Association of Athletics Federations in 2007 was another element of successful
endeavor where highly reliable and quantitative data and analysis methods were transmitted.
Variety of captioning approaches, real time scientific justifications, and quantitative andqualitative interpretations presented by the 2011 Daegu World Championships biomechanics
project team through mass communication won positive responses from TV viewers and wasevaluated as being a better and one-step advanced project than 2009 Berlin WorldChampionships project. With these diverse camerawork and state-of-art analysis technology,
biomechanics analyses and researches on various events were carried out. High-speed digital
video cameras and Kwon 3D Program were used for 3 dimensional motion analysis, and thevideo images and data of individual motions of athletes were collected in real time, analysed
in real time and documented in daily reports for immediate feedback (Figure 2).

Figure 2. Videotaped using three high-speed cameras in IAAF World Championships Daegu
2011 (javelin throw)

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The 8 events, male 100 m, female 100 m, 110 m Hurdle, pole vault, high jump, long jump,
triple jump, shot put and javelin were analysed.

Figure 3. Calibrated area and set up for DLT structure
In the male and female 100 m finals, the acceleration section and running section for 4
male high rank players, and running section for 4 female high rank players were analysed.
The hurdling technology at 5th and 6th hurdles of 4 male and 4 female high rank players atfinals of the 110 m hurdles were analysed. In the male and female pole vaults, the motions at
the approach run stage, jumping stage, pole bending stage and pole spreading stage of 8
male and 8 female high rank players were analysed. In the male and female high jumps, thespeed of the middle of the body, leaping angle, the angle of the knee joint and the angle ofthe body slope at feet stamping of 3 male and 3 female high rank players were analysedthrough 4 high speed digital video camera. In the male and female long jumps, theapproaching section, feet stamping section, flying section and landing section of the races of 8
male and 8 female high rank players were analysed. In the male and female triple jumps, thejumping distance of each section, COM jumping speed and jumping angle of the best recordsof 8 male and 8 female finalists were analysed. In the shot puts, the elapsed time of delivery,height of throw, angle of throw, throw speed, angular speed of the arm and hip, speed of the
body center and trace of throw of the best records of 8 male and 8 female high rank players
were analysed. In the male glide type shot put, the gliding and release motion of the Korean
athlete, gold medalist and bronze medallist were analysed through 3 video cameras. Lastly, inthe javelin throw, the release speed, release angle, angle of posture, attack angle, height ofthrow, slope angle of the body segment, sectional distance and timing element of 3 male and3 female high rank players, and a Korean athlete were analysed.

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Figure 4. Camera settings for the videotaping

Figure 5. Biomechanical data analysis for daily report

Through these detailed biomechanics analyses, the motions of world-class athletes wereanalysed and translated into the quantitative and qualitative data that can significantly help thedevelopment of world's athletics technology and Korean athletics development and the higher
level of Korean biomechanics analysis technology was well recognized worldwide.
2. Sport Biomechanics Projects at 2005 Helsinki, 2007 Osaka, and 2009 Berlin WorldChampionships
1,668 athletes, from 191 countries, attended the 2005 10thWorld Championships in Helsinki.

Scientific equipment was provided, by the Helsinki Athletics Federation, to the biomechanics
team that was formed to improve athletic performance through quantitative data analysis. The
team's effort to create diverse scientific video images taken by the GRF(ground reaction force
system) installed on the ground before the Championships and to improve technology level ofmeasuring ground reaction forces was evaluated as a significant advance. Analyses for thesprints, pole vault, long jump and high jump from various aspects were carried out to preparea biodynamics performance evaluation report for performance improvement.
1,800 athletes from 197 countries attended the 2007 11th World Championships at Osaka.
The sport biomechanics team was formed by the Japan Athletics Federation to respond theinterests and concerns of the IAAF, the organizing committee of 2007 IAAF World Championships
and Japan Athletics Federation that regarded the sport biomechanics research as an important
tool for increasing athletic capabilities of the athletes and promoting peoples's participation inathletics. The results of the team's effort was evaluated as useful data for later sports science
researches. As soon as an event was completed, the team issued the qualitative and thequantitative analysis report for improving the performance of the athletes attended the event,which was highly regarded by professionals and mass communication (Osaka, 2007; Alonso etal 2009; Graham-Smith, & Lees 2005; Muraki, Ae, Yokozawa, & Koyama, 2005; Burke, L.,
Maughan, & Shirreffs, 2007).

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Figure 6. MOU between Korean Society of Sport Biomechanics (KSSB) and Japan Associationof Athletics Federations (JAAF)th1,994 athletes from 201 countries attended the 2009 12

Berlin World Championships. The sport

biomechanics team was formed by the German Athletics Federation for increasing athletic capabilitiesof the athletes, respecting citizen's right to know and increasing viewing rate of the Championships.
The team presented real time video images made by quantitative, qualitative and scientific analyses
through mass media. The effort won popular acclaim and the technology used by the team wasevaluated as being one step advanced from the analyses of the Osaka and Helsinki teams whichwere provided with some time-lag (Berlin, 2009a, 2009b). The hurdle, hammer throwing, races, long
jump, triple jump and other various events were analysed using the state of the art scientificequipment including motion analysis cameras, ground reaction force equipment, super high-speed
camera and velocity measuring device. The analyses reports full with quantitative and qualitative data
were evaluated as being useful for the development world athletics, athletes abilities and athletic
technology (Bouchouras, Moscha, Papaiakovou, Nikodelis, & Kollias, 2009; Hommel, 2009; Panoutsa
kopoulos, & Kollias, 2007, 2009).

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Ⅳ. Discussions
The results of the sport biomechanics research projects performed at the 2011 Daegu WorldChampionships in Athletics and other previous Championships are analysed for identification of
better and more effective measures of the research.
1. The sport biomechanics research project performed at the 2011 Daegu Championships

Figure 7. Biomechanics Research Project TF team in the IAAF World Championships Daegu
2011.
For the Daegu World Championships in Athletics, a joint research agreement made withJapan Association of Athletics Federations for highly reliable and quantitative data and analysis
methods exchange. The research project team's effort including this joint agreement resulted from theagreement of the Ministry of Culture, Sports and Tourism and the Korea Athletics Federation, IAAF,
organizing committee of 2011 IAAF World Championships and mass communication which regarded
the research as an essential element for athletics development. The research agreement with the
JAAF helped the Daegu team air more diverse video images with scientific justifications, andquantitative and qualitative interpretations to lead to much more positive responses from TV
viewers than those of the Berlin Championships. Real time analyses of the finished events

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were carried out to prepare daily reports that were distributed to mass media the next day forreal time feedback. The higher level of quantitative and qualitative analysis data was includedin the reports to be distributed to mass media to lead to the formation of a framework of
future Korean athletics technology research. Especially, the consortium of the project team,mass media, IAAF, KAAF and organizing committee of 2011 Daegu World Championships inAthletics enabled to provide more effective stereo-scopic video images through scientificanalyses using the state of the art 3-dimensional video technology, velocity measuring laser
beam and ultra high-speed cameras.
th

The 14 IAAF World Championships is held at Moscow in 2013. Daegu city was designated as theCity of International Athletics, for the successful hosting of 2011 Daegu World Championships inAthletics and its contribution to world athletics development, in the World Athletics Gala held by the
IAAF. At least to respond this, continuous attention to and researches for sport biomechanics isneeded for the development of Korean athletics, enhancement of domestic athletes abilities andwinning medals in the Championships. Winning medals in the Championships and nurturing starplayers would be a catalyst for promotion of Korean athletics and creating citizen's interests. For
decreased performance gap with the world top rank players and overcoming physical disadvantage,
the sport biomechanics analyses should be applied to coaching technology and training strategies
through continuous development and researches of the biomechanics. Continuous cooperation with
the KAAF including awarding related MOU is also needed for continuous research. One of the regrets
is that only 8 events were allowed for the analysis, and the attendance of the limited number ofofficials were granted while the capability of the research team exceeds it.
2. The sport biomechanics research projects performed at 2005 Helsinki, 2007 Osaka and2009 Berlin Championships
The sport biomechanics research projects performed at 2005 Helsinki Championships resulted in
more excellent effects than expected. This success of the research project team's effort resulted fromthe understanding and support of the Finland Athletics Federation, IAAF and organizing committee ofthe World Championships which regarded the research as a useful element for athletes ability
development and creating citizen's interests. Proper preparation for the Championships including the
installation of the ground reaction force measuring system in advance was an impressive factor. The
ground reaction force measuring system is evaluated as leading the development of the groundreaction force measuring technology and signifies that proper preparation for measurement systemwith prior agreement is essential for successful provision of various data and development of world
athletics. The sport biomechanics research team of Osaka was formed based on a science
committee, which resulted from the opinion of the Japan Association of Athletics Federations, IAAF
and organizing committee of the World Championships which regarded the scientific research as a
useful element for athletes ability development and creating citizen's interests, which proved true. The

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sport biomechanics research team of Berlin was formed for increasing athletic capabilities of theathletes, respecting citizen's right to know and increasing viewing rate of mass media. The teampresented real time video images made by quantitative, qualitative and scientific analyses
through mass media. The effort won popular acclaim and the technology used by the teamwas evaluated as being one step advanced from the analyses of the Osaka and Helsinki
teams which were provided with some time-lag. This real time data provision is one of themost important elements modern mass media want to present to viewers who prefer quick
feedback.

Ⅴ. Conclusion
This study aimed to identify the measures to perform biomechanics researches more
effectively for development of the development of the Korean athletics through analysing theprocess and results of the sport biomechanics research project performed successfully during
2011 Daegu World Championships and the projects performed at previous Championships.
First, the preparation for measuring systems and surveys of the stadium prior to theChampionships enabled to successfully provide correct and various information. Sufficient
preparation for biomechanics research project including preparation for the measurement,
rehearsals, and stadium surveys facilitates the use of more complex and various equipmentthat enables to create more various and precise scientific data and, in turn, to make theproject more effective.
Second, it is necessary to promote more practical researches that can be utilized forathletics development and athlete's performance enhancement through data provision forcoaching and establishing strategies, and application of the data to actual plays and feedbackof the application.
Third, the consortium of the Daegu project team, mass media, IAAF, KAAF and organizing
committee of 2011 Daegu World Championships in Athletics enabled the project team to provide themass media with more effective stereo-scopic video images coupled by quantitative and qualitative
information in real time through scientific analyses using the state of the art 2-dimensional and3-dimensional video technology to lead to much more positive responses from TV viewers.
The sport biomechanics project team of the 2011 Daegu World Championships in Athletics
proved that scientific analyses and resultant real time data play an important role in theathletics development, athlete's performance enhancement, scientific approach to sports andathletics technology development. It is hoped that this study can be assistance to coaching
technology and strategy and cause wider attentions to scientific and biomechanics approaches
in sports.

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Biomechanics Analysis of the Men's
100 Meters Sprint during the
IAAF World Championships, Daegu 2011

• Director :Ji-Seon Ryu(Korea National Sport University, Korea) · Jae-Kyun Ryu(Kyunghee University, Korea)
Tae-Sam Kim(Korea National Sport University, Korea) · Young-Jin Park(Kyunghee University, Korea)
Won-Seob Hwang(Korea National Sport University, Korea) · Suk-Hoon Yoon(Korea National Sport
University, Korea) · Sang-Kyoon Park(Korea National Sport University, Korea)• Researcher :Hiroyuki Koyama(Kyoto University of Education, Janpan) · Takashi Mochida(Yokohama Sports
Association, Janpan) · Koji Hoga-Miura(Seikei University, Janpan) · Kazuhito Shibayama(Universityof Tsukuba, Janpan) ․ Kadono Hirosuke(University of Tsukuba, Janpan) · Tanji Hiroki(Kodaira City
Kamishuku Primary School, Janpan)

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1. Men's 100 Meters
The world record for the men’s 100 meter race, 9.58 seconds, was set by Usain Bolt (JAM)
at the IAAF Berlin World Championships (WC) 2009. Therefore, at the IAAF WC, Daegu 2011,
people were anxious to see if he would break his world record. On the 28th of August, 2011,
the men’s 100 meter semi-finals and finals were held at 6 PM and 8:45 PM, respectively.
During the IAAF WC, Daegu 2011, a team of biomechanics researchers was organized toanalyze sprinting movement at the 100 meter final race (Figure 1).

Figure 1. Biomechanics research team for sprinting events
Measurement of running speed using the LAVEG system :Three laser speed guns (LAVEG Sport, Jenoptik, Germany) were used to measure thesprinting speed (Figure 2). <Figure 2> shows the LAVEG system and the calibration process
being done by two individuals in the 100 meter lane. The system measured an instantperformance time at a given distance. Therefore, an instant speed of the sprinter was

Figure 2. LAVEG System calibration process (100 meter) / View from LAVEG System at the Stadium

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calculated by dividing the distance by time. Data was sampled with a frequency of 100 frames
per second and filtered with a low pass filter (cut off frequency: 0.5 Hz). Based on the records
from the qualification rounds, three sprinters were selected for sprinting speed measurement.
The measurement of sprinting characteristics by high-speed cameras
The panning technique (Chow, 1993) was applied to capture the selected sprinting
characteristics of the sprinters during the race. This method is recognized as an effective way
to photograph a fast moving object using high-speed cameras. Five high-speed cameras(Casio EX-F1, Japan) operated by individuals from the research team were located in the
spectator’s area on the second floor of the stadium and were aligned with the 13, 30, 47, 64
and 81 meter lines (Figure 3, 4). Video imagery with a sampling frequency of 300 Hz wassynchronized to the signal of the start gun. Once all the images were collected from the fivecameras, software (Vegas, Sony, Japan) was used to calculate an average speed (m/sec), thenumber of steps (n), stride length (meter), and stride frequency (m/sec). The number of steps
was visually counted from the images and, in particular, the last step was calculated from thenumber of sampled images at the finish line. Step length was calculated by dividing theperformance distance, 100 meters, by the number of steps. Step frequency was calculated by
dividing the number of steps by the performance time. The correlation coefficients between theperformance time and each variable were calculated using Matlab (MathWorks, USA) with analpha level of 0.05.

Figure 3. The locations of each high-speed camera in the stadium

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Figure 4. Camera view from the stadium (cameras 1 to 5 from the top left to right)
Usain Bolt’s (JAM) qualification rounds
Usain Bolt (JAM) participated in one of the seven qualification rounds held on the 27th ofAugust 2011. He won the race with a performance time of 10.10 seconds and with a reaction
time of 0.153 seconds. His reaction time was the third best among the eight sprinters(mean :0.167 ± 0.021 seconds) and his average number of steps was 40, which was four to thirteen
less than the other sprinters (Table 1).

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Table 1. Biomechanical Analysis of Men's 100 Meters Sprint (Round 1, Heat 6)
Rank

1
2
3
4
5
6
7
8

Name
Usain BOLT
(JAM)
Dwain CHAMBERS(GBR)
Angel David RODRIGUEZ(ESP)
Simon MAGAKWE(RSA)
Nilson ANDRE(BRA)
Gerald PHIRI(ZAM)
Abdouraim HAROUN(CHA)
Moudjib TOYB
(COM)

Finish Time

Reaction(sec)Time(sec)

10.10

0.153

10.28

Avg. Step Length(m)Avg. Step Frequency(m/sec)

Total Steps
0-47m

-64m

-100m

0-47m

-64m

-100m

40

2.24

2.83

2.71

3.96

4.02

3.86

0.171

44

2.04

2.43

2.71

4.24

4.58

3.90

10.37

0.172

47

1.96

2.27

2.38

4.41

4.82

4.41

10.53

0.150

50

1.74

2.13

2.71

4.84

5.09

3.88

10.54

0.146

53

1.68

2.13

2.11

4.96

5.16

5.00

10.60

0.211

47

1.88

2.27

2.71

4.48

4.74

3.77

10.72

0.179

46

1.96

2.43

2.38

4.28

4.30

4.29

11.12

0.157

48

1.88

2.27

2.38

4.32

4.45

4.07

<Table 2> shows the changes in Usain Bolt’s sprinting speed compared to the first place sprinters in groups 5 and 7. Usain Bolt's maximum
speed was 11.64 m/sec at a distance of 55.27 meters. <Table 2> indicates that Usain Bolt reacheds his maximum speed at a later stage ofthe race in comparison to Michael Frater (JAM) and Nester Carter (JAM), who won the first rounds in groups 5 and 7, respectively(Figure 5).

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201117/207

Table 2. Changes in Sprint Speed During the Men’s 100 Meter Qualifying Rounds (first place in round 1, groups 5, 6 and 7, on, August 27th, 2011)
20m

30m

40m

50m

60m

70m

80m

90m

100m

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)

6/1/4

5.30

9.63

10.78

11.31

11.59

11.64

11.59

11.38

10.94

10.12

11.64

55.27

10.10

7/1/5

5.17

9.48

10.59

11.15

11.35

11.40

11.32

11.11

10.74

10.31

11.42

50.61

10.26

5/1/3

5.33

9.57

10.69

11.12

11.25

11.29

11.21

11.00

10.66

10.17

11.31

54.55

10.26

Rank/
Lane
Usain
Bolt
MichaelFraterNesterCarterDistanc

10m

Group/

Max
Speed(m/sec)

e at
Max
Speed

Total
Time
(sec)

Figure 5. Average speed curve of three top sprinters in
the first round of the men's 100 meter sprint

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201118/207

Table 3. Changes in Usain Bolt's (JAM) speed during the 100 meter sprint (Round 1 and Semi-Finals, August 27-28th, 2011)
DistanReaction

10m

20m

30m

40m

50m

60m

70m

80m

90m

100m

Max

Time

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

speed

(sec)

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

Speed

(m/sec)

1/6

0.153

5.30

9.63

10.78

11.31

11.59

11.64

11.59

11.38

10.94

10.12

11.64

55.27

10.10

1/3

0.164

5.30

9.58

10.71

11.32

11.58

11.71

11.71

11.61

11.25

10.15

11.72

56.17

10.05

Rank/
Lane

ce at
Max
Speed

Total
Time
(sec)

Usain
Bolt(JAM)-Round 1
Usain Bolt
(JAM)Semi Final

Comparison of Usain Bolt’s first round and semi-final times
When comparing the differences in magnitude and distance of maximum speed between the first round and the semi-finals, Usain Bolt’s(Table 3) reaction time of 0.164 seconds in the semi-final was slower than his reaction time (0.153 seconds) in the first round but an overallmaximum sprinting speed was faster in the semi-finals. His maximum speed, in the semi-finals was, 11.72 m/sec, observed at a distance of
56.17 meters, while his maximum speed in the first round of 11.65 m/sec was observed at a distance of 55.27 meters. Therefore, Usain Bolt
showed a 0.05 seconds faster performance time in the semi-finals(10.05 seconds vs. 10.10 seconds).

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Figure 6. Average Speed Curve of Usain Bolt’s Round 1 andSemi-Final
The results of the men’s 100 meter finals
At the men's 100 meter finals on August 28th, 2011, Usain Bolt (JAM) had a false start which was 0.104 seconds earlier than the start gun
al. His, teammate, Yohan Blake (JAM) won the race with a time of 9.92 seconds. His maximum speed was 11.75 m/sec at the distance of
57.9 meters in the finals (Table 4, Figure 7).

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

20/207th

Table 4. Changes in Yohan Blake’s Speed During the 100 Meter Sprint (Finals, August 28 , 2011)
10m
Rank/
Lane

30m
Avg.
Speed

40m
Avg.
Speed

50m
Avg.
Speed

60m
Avg.
Speed

70m
Avg.
Speed

80m
Avg.
Speed

90m
Avg.
Speed

100m
Avg.
Speed

Avg.
Speed

20m
Avg.
Speed

(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)(m/sec)

5.35

9.76

10.84

11.32

11.62

11.74

11.71

11.63

11.49

11.29

Max
Speed

Total

(m/sec)Distance
at Max
Speed

11.75

57.9

9.92

Time
(sec)

Yohan
Blake
(JAM)-

1/6

Final

Figure 7. Average Speed Curve of Yohan Blake’s 100 Meter Finals

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201121/207

In the final race of the men’s 100 meter event, Yohan Blake's (JAM) a reaction time was of 0.174 seconds which is slower than the othersprinters but he reached his fastest sprinting speed after 30 meters, finishing the race in first place. He Took 47 steps during the race. which
was similar to the average of the other sprinters, steps in the final: 46.71±2.75 (Table 5). Furthermore, Yohan Blake (JAM) showed the anability to maintain his maximum sprinting speed until the end of the race (Figure 8).
Table 5. Biomechanical Analysis of the Men's 100 Meter Finals (Finals, August 28th, 2011)
Rank
/Lane

Name

Finish Time

Reaction(sec)Time (sec)

Total Steps

Avg. Step Length (m)Avg. Step Frequency

0-47 m-64 m-100 m0-47 m-64 m-100 m1/
6

Yohan BLAKE
(JAM)

9.92

0.174

47

1.88

2.43

2.38

4.69

4.88

4.65

2/
4

Walter DIX
(USA)

10.05

0.175

49

1.81

2.27

2.38

4.78

5.18

4.58

3/
3

Kim COLLINS
(SKN)

10.10

0.155

49

1.81

2.27

2.38

4.88

5.03

4.49

4/
8

Christophe LEMAITRE
(FRA)

10.14

0.179

41

2.14

2.62

3.17

4.03

4.38

3.40

5/
2

Daniel BAILEY
(ANT)

10.14

0.165

48

1.88

2.27

2.38

4.58

4.99

4.47

6/
1

Jimmy VICAUT
(FRA)

10.32

0.162

46

1.96

2.27

2.71

4.42

4.96

3.86

7/
7

Nesta CARTER
(JAM)

10.49

0.154

47

1.96

2.27

2.38

4.28

4.67

3.76

8/
5

Usain BOLT
(JAM)

DQ

-0.104

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Figure 8. Average Speed Curve of the Men's 100 Meter Finals
AnalysisAt the IAAF WC Daegu 2011, Yohan Blake (JAM) won the men’s 100 meter finals with atime of 9.92 seconds. His performance time is not better than Tyson Gay’s 9.85 seconds in
the IAAF WC Osaka 2007 or Usain Bolt’s 9.58 seconds in the IAAF WC Berlin 2009.
The first to third place sprinters had reaction time of 0.137 to 0.145 seconds at the IAAF
WC Osaka 2007 while a reaction time of 0.137 seconds to 0.146 seconds were observed at
the IAAF WC Berlin 2009. However, the three top finishers in Daegu had a reaction times of
0.155 to 0.174 seconds which were slower than those of previous competitions. In particular ,Yohan Blake’s reaction time of 0.174 seconds was slower than the winner of Berlin WC,
Usain Bolt’s 0.146 seconds and the winner of the Osaka WC, Tyson Gay’s 0.143 seconds.
When comparing the maximum sprinting speed of the competitions, we find that Tyson
Gay's (USA) maximum speed of 11.83 m/sec at 65 meters at the IAAF Osaka WC 2007 was
faster than Yohan Blake's (JAM) maximum speed of 11.75 m/sec at 57.9 meters at the IAAF
Daegu WC 2011.

References
Chow, J. W.(1993) Panning video graphic technique to obtain selected kinematics
characteristics of the stride in sprint hurdling. Journal of Applied Biomechanics, 9(2).149-159.

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201123/207

Biomechanical Analysis of the Women's
100 Meters Sprint at the IAAF WorldChampionships Daegu 2011

• Director :Ji-Seon Ryu(Korea National Sport University, Korea) · Jae-Kyun Ryu(Kyunghee University, Korea)
Tae-Sam Kim(Korea National Sport University, Korea) · Young-Jin Park(Kyunghee University, Korea)
Won-Seob Hwang(Korea National Sport University, Korea) · Suk-Hoon Yoon(Korea National Sport
University, Korea) · Sang-Kyoon Park(Korea National Sport University, Korea)• Researcher :Hiroyuki Koyama(Kyoto University of Education) · Takashi Mochida(Yokohama Sports Association)
Koji Hoga-Miura(Seikei University) · Kazuhito Shibayama(University of Tsukuba)
Kadono Hirosuke(University of Tsukuba) · Tanji Hiroki(Kodaira City Kamishuku Primary School)

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2. Women‘s 100 Meters
The women’s 100 meter world record of 10.49 seconds was set by Florence Griffith-Joyer(USA) in the quarter-finals of the US Olympic Trials and has not been broken for over 20
years. Camelita Jeter (USA) or Veronica Campbell-Brown (JAM) were predicted to win thewomen's 100 meter event at the IAAF Daegu World Championships (WC) 2011. Carmelita
Jeter had recorded the fastest time for the season, while Veronica Campbell-Brown had thefastest qualifying time in Daegu. After the qualification rounds for seven groups followed bythree semi-final races, the eight finalists were selected for competing at the final race on theevening of the 29th of August, 2011. Carmelita Jeter had recorded the fastest time for thequalification rounds for seven groups followed by three semi-final races, the eight competitors
were selected to compete at the final race on the final race on the evening of August 29th,
2011. Carmelita Jeter (USA) won the race with a time of 10.90 seconds, followed by Veronica
Campbell-Brown (JAM) and Kelly-Ann Baptiste (TRI), with times of 10.97 seconds and 10.98
seconds, respectively.
The biomechanics research team, supported by the IAAF has been actively involved in thescientific support of world class competitions since the Rome WC in 1987 and the 1988 Seoul
Summer Olympic Games. The purpose of the biomechanics project during the IAAF WC,
Daegu 2011 was, to analyze the sprinting characteristics of the finalists in the women's 100
meter event.
Methods
Biomechanical analysis was conducted to capture the movements of the eight finalists(meanage: 26.38 ± 2.92 years, mean height : 168.75 ± 7.05 cm, mean weight: 56.50 ± 5.76 kg) in
the women’s 100 meter final event (Table 1).
Table 1. Eight finalists in the women’s 100 meter final event
Rank

Name

Country

Lane

Results (sec)1

Carmelita Jeter

USA

4

10.90

2

Veronica Campbell-Brown

JAM

8

10.97

3

Kelly-Ann Baptiste

TRI

5

10.98

4

S.A. Fraser-Pryce

JAM

3

10.99

5

Blessing Okagbare

NGR

2

11.12

6

Kerron Stewart

JAM

6

11.15

7

Ivet Lalova

BUL

1

11.27

8

Marshevet Myers

USA

7

11.33

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Laser gun(Laveg Sport, Jenoptik, Germany) was used to measure the speed of sprinting.
The system measured an instant performance time at a given distance, therefore, an instant
speed of the sprinter was calculated by the distance divided by time. Data was sampled witha frequency of 100 frames per second and filtered with a low pass filter (cut-off frequency :0.5 Hz).
Panning technique (Chow, 1993) was applied to capture the selected sprinting characteristicsof the sprinters during the race. This method is known as an effective way to photograph afast moving object with a fast shutter speed. Five high speed cameras operated by eachindividual from the team were located at the spectator’s area on the second floor of thestadium (Figure 1). The video image with a sampling frequency of 300 Hz was synchronized
to the sign of the start gun going off near the start line. Once all the images were collectedfrom the five cameras, software (Vegas, Sony, Japan) was used to calculate an average
speed (m/sec), the number of steps (n), stride length (meter), and stride frequency (m/sec).
The number of steps is visually counted from the image and, especially, the last step was
calculated from the number of sampled images at the finish line. The step length is calculatedby the performance distance, 100 meter, divided by the number of steps. The step frequency
is calculated by the number of steps divided by the performance time. The correlation
coefficients between the performance time and each variable were calculated using Matlab
program (Math Works, USA) with an alpha level of 0.05.

Figure 1. High speed camera (Casio, EX-F1, Japan) and the locations of each camera at the stadium

Results
Carmelita Jeter (USA) won the race with a record of 10.90 seconds. She reached maximum
speed of 10.54 m/sec at the distance of 58.4 meters in the final (Figure 2, Table 2).

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Table 2. Changes in speed of Carmelita Jeter’s 100meter sprint in the final

Carmelita
JETER
(USA)

Rane
/
Lane

10m
Avg.
speed
(m/sec)

20m
Avg.
speed
(m/sec)

30m
Avg.
speed
(m/sec)

40m
Avg.
speed
(m/sec)

50m
Avg.
speed
(m/sec)

60m
Avg.
speed
(m/sec)

70m
Avg.
speed
(m/sec)

80m
Avg.
speed
(m/sec)

90m
Avg.
speed
(m/sec)

100m
Avg.
speed
(m/sec)Max Distancespeed at(m)Max(m/sec) Speed

Total
Time
(sec)

1/4

5.16

8.99

9.95

10.39

10.51

10.53

10.43

10.25

10.12

9.83

10.54

10.90

58.4

Figure 2. Average speed curve of Carmelita Jeter’s (USA) 100 meters final

Carmelita Jeter (USA) and S.A. Fraser-Pryce (JAM) were competing first place between 50 meters and 80 meters but Carmelita Jeter wasable to maintain a high level of sprinting speed during the last 10 meters (Table 3).

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201127/207

Table 3. Biomechanical Analysis of 100 meter women’s sprint
Rank/
Lane

Name

Parameter

0-13m

-30m

-47m

-64m

-81m

-89.5m-100m

Total teps

Avg. SL

Avg. SF

1/
4

Carmelita JETER (USA)Lap time
(sec)

2.32

4.11

5.73

7.35

8.97

9.80

10.90

50.5

1.98

4.63

Avg. Speed
(m/s)

5.60

9.53

10.47

10.52

10.45

10.32

9.52

Lap time
(sec)

2.39

4.17

5.81

7.42

9.03

9.85

10.97

49.6

2.02

4.52

Avg. Speed
(m/s)

5.44

9.57

10.34

10.54

10.60

10.37

9.35

Lap time
(sec)

2.20

4.11

5.76

7.39

9.02

9.85

10.98

50

2.00

4.55

Avg. Speed
(m/s)

5.92

8.87

10.32

10.43

10.41

10.24

9.32

Lap
time (sec)

2.32

4.10

5.73

7.35

8.98

9.85

10.99

50

2.00

4.55

Avg.
Speed (m/s)

5.60

9.53

10.47

10.45

10.43

9.85

9.18

Lap
time (sec)

2.36

4.14

5.84

7.49

9.15

9.99

11.12

47.4

2.11

4.26

Avg.
Speed (m/s)

5.50

9.59

10.00

10.30

10.24

10.12

9.26

Lap
time (sec)

2.38

4.18

5.84

7.50

9.14

9.98

11.15

47

2.13

4.22

Avg.
Speed (m/s)

5.47

9.41

10.24

10.28

10.32

10.20

8.95

Lap
time (sec)

2.38

4.22

5.94

7.60

9.27

10.12

11.27

50

2.00

4.44

Avg.
Speed (m/s)

5.46

9.24

9.90

10.20

10.22

9.92

9.16

Lap
time (sec)

2.41

4.25

5.94

7.62

9.28

10.14

11.33

47.6

2.10

4.20

Avg.
Speed (m/s)

5.39

9.26

10.04

10.14

10.22

9.96

8.80

2/
8

3/
5

4/
3

5/
2

6/
6

7/
1

8/
7

Veronica CAMPBELL BROWN (JAM)

Kelly-Ann
BAPTISTE (TRI)S. A.
FRASER - PRYCE (JAM)

Blessing OKAGBARE(NGR)

Kerron STEWART(JAM)

Ivet LALOVA(BUL)Marshevet MYERS (USA)Biomechanics Research Project Report in the IAAF World Championships, Daegu 201128/207Based on the results, there was a tendency to show the relationship between the sprinters’
performance time and their physical characteristics. Lighter weight and shorter height seen to bepositively related with performance time based on the correlation analysis, but it was notstatistically significan t(Figure 3).

Figure 3. Correlation coefficients between the performance time and sprinters’ height
and weight<Table 4> shows the sprinters sprinting characteristics such as reaction time, the number ofsteps, step length, and step frequency. Performance time ranged from 10.90 seconds to 11.33
seconds with a range of 0.147 seconds and 0.234 seconds of reaction time. The number ofsteps ranged from 47.00 steps to 50.50 steps with a range of 1.98 meter and 2.13 meter instep length. The first place sprinter showed the highest step frequency with the highest numberof steps and the shortest step length among the eight finalists.
Table 4. Descriptive data of eight sprinters during women’s 100 meter final
Rank

Time
(sec)

Reaction time(sec)

# of steps(n)

Step length(meter)

Step frequency(# of steps/sec)

1

10.90

0.167

50.50

1.98

4.63

2

10.97

0.234

49.60

2.02

4.52

3

10.98

0.151

50.00

2.00

4.55

4

10.99

0.194

50.00

2.00

4.55

5

11.12

0.147

47.40

2.11

4.26

6

11.15

0.212

47.00

2.13

4.22

7

11.27

0.156

50.00

2.00

4.44

8

11.33

0.164

47.60

2.10

4.20

Mean ± SD

11.09 ± 0.15

0.178 ± 0.032 49.01 ± 1.42 2.04 ± 0.06

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4.42 ± 0.17

29/207

Figure 4. Correlation coefficients between the performance time and the sprinting
characteristics (a: # of steps, b: stride length, c: reaction time, and d:
stride frequency)<Figure

4>

shows

the

linearrelationshipbetweenperformance

time

and

sprintingcharacteristics. There was a trend that showed a significant correlation between the sprinters’
sprinting characteristics and their performance time. Especially, a faster stride frequency has apositive impact on performance time (R=0.7897, P=0.02). Furthermore, a higher number of steps
and shorter stride length seemed to be related with the faster performance time but was not
significant. The reaction time and performance time of the sprinters were not related.
Conclusion
A mathematical model proposed by Peronnet & Thibault (1989) has predicted that theultimate performance time of a 100 meter sprinting would be 9.37 seconds for men and 10.15
seconds for women. In Berlin WC 2009, Usain Bolt (JAM) in the men’s 100 meters event
broke the world record with a record of 9.58 seconds but no strong female sprinters has
stepped up to break Florence Griffith-Joyner’s (USA) current record, 10.49 seconds for over
20 years. This research was conducted during the 100 meter women’s event in the IAAF

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Daegu 2011 and aimed to provide useful information to track and field coaches and athletes
through the analysis of sprinting strategies of today’s top female sprinters.
It is generally accepted that a quicker reaction time to start the 100 meter sprint is criticalto perform the best race. When Veronica Campbell-Brown (JAM) won the race with a recordof 11.01 seconds in Osaka WC 2007, her reaction time was 0.167 second and the second
place, Williams (USA)’s reaction time was 0.145 seconds (JAAF, 2007). On the other hand,
Fraser Shelly-Ann (JAM) won her race with a record of 10.73 seconds and with a reaction
time of 0.146 seconds in Berlin WC 2009. Finally, in Daegu WC 2011, the reaction time of the
top three sprinters was 0.167 seconds, 0.234 seconds, and 0.151 seconds, respectively.
Carmelita Jeter (USA) who won the women’s 100 meter final race with a record of 10.90
seconds, showed a reaction time of 0.167 seconds. This was slower than her reaction time of
0.160 seconds in Berlin WC 2009. However, there was no direct relationship found between
reaction time at the start and final performance time of the race.
Based

on

the

relationshipbetweenperformance

time

and

the

sprinters’

physicalcharacteristics, the lighter and shorter sprinters seem to perform better among the eight
finalists. It was found that top four sprinters’ physical characteristics were ranged from 160 cm
to 167 cm in height and 52 kg to 54 kg in weight. On the other hand, heavier sprinters seemto perform better but the height of the sprinters does not seem to be related to performancetime when analyzing the men’s 100 meter final event at Daegu WC 2011. There would be an
existing gender difference between men and women but further investigation would be
required to find the exact relationships between performance and physical characteristics
based on the higher number of the top sprinters in the analysis.
There was a tendency to show a better performance time with a higher number of steps
and a shorter stride length among the eight sprints. Furthermore, stride frequency andperformance time were negatively correlated, as a higher stride frequency had a positive
impact on performance time. Therefore, female sprinters using a short step length and a fast
stride cycle during their sprints would see a positive impact on their performance. Furthermore,
the unpublished data of men’s sprinting characteristics in 100 meter in Dague 2011 also show
a similar trend between sprinting characteristics and performance time but the relationship was
weaker than women sprinters’.
A previous study investigated the sprinting strategies of male sprinters who have an average
record of 11.09±0.15 seconds (Mackala, 2007). The study suggested that an appropriate
adjustment of step frequency and step length in the first 10 to 20 meters of a race isimportant to perform the best in a 100 meter race. Therefore, how the sprinters change
sprinting characteristics such as stride length and frequency during acceleration, mid-race, andfinish phases would be required to understand the sprinting strategy of today’s top class

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201131/207

sprinters in the women’s 100 meter.

References
Chow, J. W. (1993). Panning video graphic technique to obtain selected kinematics characteristics ofthe stride in sprint hurdling. Journal of Applied Biomechanics, 9(2), 149-159.
JAAF (2007). Biomechanics report of Japan biomechanics research project in IAAF WorldChampionships in athletes for the 2007 Osaka WC(Edited by Ae, M.), Japan Associationof Athletes Federations.
Mackala, K. (2007). Optimisation of performance through kinematic analysis of the different
phases of the 100 metres. New Studies in Athletes, 22(2), 7-16.

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201132/207

13th IAAF World Championships,
Daegu 2011 Final Report :Men's Pole Vault• Director :Kyoo Jeong Choi (Korea Institute of Sport Science (KISS))
Ok Kyung Yi (Professor, Ewha Woman's University, Korea)• Researcher :Nam Hee Kim(Ewha Woman's University Doctoral Candidate, Korea) · Ji Eun Kang (Ewha
Woman's University Doctoral Candidate, Korea) · Hye Lim Kim (Ewha Woman's University
Master's Candidate, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201133/207

3. Men's Pole Vault
At the 2011 Daegu World Track and Field Competition, five sets of video cameras wereused to analyze male pole vaulters during the preliminary (28 competitors) and final (8competitors) competitions. There were two staggered, parallel pole vault pits operating during
the competition. Camera three recorded a frontal view of vaulters at pit A. Camera four
captured a frontal view of vaulters at pit B. In the sagittal plane two cameras were used torecord movement for both pits. Camera one covered the vaulter's initial approach, whilecamera two recorded the final approach and vault. The fifth camera was used to record
statistical information about the vaulters on the stadium's display screen (Figure 1). DLT sets
were used for two-dimensional analysis (Figure 2). Analytical variables included total approach
distance, number of steps, mean step length, approach position, and average velocity from
6~11 meters away from the pole box.

recordingFigure 1. The layout of cam 1-5 for recording pole vault competition

Figure 2. The layout of DLT for calibration
Preliminary competition began at 10:38 AM on a calm morning on August 27th, 2011. 28
athletes were separated into group A and group B. The two groups included seven of the
IAAF's top-ten rated pole-vaulters. The opening height for the preliminary rounds in Daegu

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201134/207was 5.20 m, 0.5 m higher than at the 2009 Berlin International Track & Field Competition, but
0.5 m lower than at the 2008 Beijing Olympics. Qualification height was preset at 5.70 m
lower than the preset qualifying height for Beijing and Berlin by 0.5 m. From 5.20 m, qualifying
heights increased to 5.35 m, 5.50 m, and 5.60 m, with the field being set at 5.65 m. 16
athletes qualified for the championship round. In Beijing, preliminary competition began at 5.15
m, increasing to 5.30 m, 5.45 m, and 5.55 m, with the field being set at 5.65 m. 12 athletes
qualified for the championship round. In Berlin, qualifying rounds started at 5.25 m, increasing
to 5.40 m, and 5.55 m, with the field being set at 5.65 m. 11 athletes qualified for thechampionship round. At all three events, the final qualifying height for the championship round
was reset to 5.65 m after the field narrowed down.
The championship rounds for pole vault started at 7:25 PM on August 29th, 2011. The
average age of the 16 finalists was 26.5 similar to the mean age of the 12 pole vault finalists
in Beijing (26.2), but a year younger than the mean age of the 11-man field in Berlin (27.6).
During the championship rounds two competitors achieved their season's best vaults (M. Mohrand K. Fillippidis), while two other vaulters set personal records (L. Borges and L. Michalski)(Table 1).
Table 1. Competition results in relation to 2011 season’s best (before the World Championships)
AthleteRank

SB 2011 (m)IAAF WCh Daegu 2011 (m)Difference (%)

Wojciechowski, P. (POL)

1

5.91

5.90

-0.2

Borges, L. (CUB)

2

5.75

5.90

+2.6

Lavillenie ,R. (FRA)

3

5.90

5.85

-0.8

Michalski, L. (POL)

4

5.75

5.85

+1.7

Mohr, M. (GER)

5

5.81

5.85

+0.7

Filippidis, K. (GRE)

6

5.73

5.75

+0.3

Didenkow, M. (POL)

7

5.75

5.75

0.0

Silva, F. (BRA)

8

5.80

5.65

-2.6

Results for analytic variables
Analytic variables for the pole vault, such as total run up distance, number of steps,
average step length, and ratio (%) were measured (Table 2). Due to pole vaulting equipment
left on the field, the first two steps for four of the eight finalists could not be clearly recorded.
Consequently, the information for the first two steps for these four competitors could not be
included into the analysis, resulting in an slight decrease in total run up distance, along withas light increase in average step length, and ratio.
Total run up distance averaged 34.0 m. Total number of steps averaged 17.5.

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These numbers were slightly lower than the 2009 Berlin results. Average step length was
2.10 m, while the ratio of average step length to height was 114.5%.
Table 2. Analytical Variables: Athlete′s height, total run-up distance, number of run-up steps,
average step length and the ratio to his height
AthleteHeight(m)

Total Run-up
Distance (m)# of Steps(step)

Average Step
Length (m)

Ratio
(%)

Wojciechowski, P. (POL)

1.85

33.34

16(SS)***

1.96

106.0

1.78

*

34.04

**

127.5

Lavillenie, R. (FRA)

1.76

*

33.59

18

**

2.10

119.3

Michalski, L. (POL)

1.89

34.20*

18(SS)***

2.14**

113.2

Mohr, M. (GER)

1.92

35.62

16

2.23

116.2

Filippidis, K. (GRE)

1.88

37.35

18

2.08

110.6

Didenkow, M. (POL)

1.80

33.42

16(SS)***

1.97

109.4

Silva, F. (BRA)

1.78

*

30.43

18

**

2.03

114.0

Average

1.83

34.00

17.5

2.10

114.5

Borges, L. (CUB)

20

2.27

*

the total run-up distance is not exactly accurate due to interference with the filming of first 1-2 steps
average step length has obtained except the first 1-2 step, so slightly higher than real***
additional 1 short step for preparation first step**

Step analysis was divided into three sections: early (the final 15th-11th steps), middle (thefinal 10th-6th steps), and final (the last 5 to the final step).
Early average step length was 2.07 m (step length / height ratio: 112.8%), increasing during
middle average step length to 2.21 m (120.8% ratio), and decreasing during final average step
length to 2.12 m (115.9% ratio). Figure 3 shows the average step length according to all threestages for Poland's P. Wojciechowski, the first place vaulter in Daegu.

Figure 3. Each step length for run-up (P. Wojciechowski)

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Table 3. Average step length for the 15-11 step, 10-6 step and 5-1 step sections(unit : m)
Average step length (AthleteHeightWojciechowski P. (POL)*)

Last 15 - 10 step

Last 10 - 6 step

Last 5 - 1 step

1.85

1.88 (101.6)

2.21 (119.5)

2.04 (110.3)

Borges L. (CUB)

1.78

2.42 (136.0)

2.24 (125.8)

2.15 (120.8)

Lavillenie R. (FRA)

1.76

2.05 (116.5)

2.17 (123.3)

2.09 (118.8)

Michalski L. (POL)

1.89

2.09 (110.6)

2.20 (116.4)

2.20 (116.4)

Mohr M. (GER)

1.92

2.25 (117.2)

2.31 (120.3)

2.19 (114.1)

Filippidis K. (GRE)

1.88

2.00 (106.4)

2.26 (120.2)

2.21 (117.6)

Didenkow M. (POL)

1.80

1.90 (105.6)

2.20 (122.2)

2.07 (115.0)

Silva F. (BRA)

1.78

1.94 (109.0)

2.11 (118.5)

2.04 (114.6)

Average

1.83

2.07 (112.8)

2.21 (120.8)

2.12 (115.9)( * ) represents the ratio of step length to his height

Table 4 shows the results for vault height (m), number of steps (step), velocity or VA(m/s)(at 11 m-6 m from pole box), and approach position or AP (m) (distance from pole box
and final foot strike) from the 2009 World Championships in Berlin alongside the results from
Daegu in 2011.
The average vault height for competitors in 2011 at Daegu was 5.81 m, an increase fromthe 2009 World Championships in Berlin (5.75 m) and the 2008 Olympics in Beijing (5.73 m)
by 6 cm and 8 cm respectively. Approach velocity increased by 0.08 m/s in Daegu (9.26 m/s),
compared to 9.18 m/s in 2009 in Berlin. Approach position increased as well by 0.22 m in
Daegu (4.44 m) compared to Berlin (4.22 m). A trend emerges when comparing the 2009
Berlin results with the 2007 results from Stuttgart. Athletes increased their approach position
by 0.23 m, indicating a higher grip or a longer pole. R. Lavillenie of France increased his
approach position more than any other athlete. In Berlin, his approach position averaged 4.65
m from the pole box, while in Daegu, his approach position averaged 4.79 m, an increase of
14 cm. Not surprisingly R. Lavillenie (FRA) employed the free-take off technique in bothcompetitions.

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Table 4. Jumping height, run-up velocity VA in section 11-6 m, number of run-up steps and take-off position AP
IAAF WCh Berlin 2009

IAAF WCh Daegu 2011

Records(m)# of Steps(step)

VA
(m/s)

AP
(m)

AthleteRecords(m)# of Steps(step)*

Athlete

VA
(m/s)

AP
(m)

Hooker, S. (AUS)

5.90

18

9.24

4.35

Wojciechowski, P. (POL)

5.90

16(SS)***

9.05

4.50

Mesnil, R. (FRA)

5.85

18

8.99

4.15

Borges, L. (CUB)

5.90

20

9.48

4.55

Lavillenie, R. (FRA)

5.80

20

9.54

4.65

Lavillenie, R. (FRA)

5.85

18

9.63

4.79

Mazuryk, M. (UKR)

5.75

18

9.12

4.30

Michalski, L. (POL)

5.85

18(SS)***

9.09

4.51

Gripich, A. (RUS)

5.75

16

8.73

4.25

Mohr, M. (GER)

5.85

16

9.05

4.47

Dossevi, D. (FRA)

5.75

20

9.35

3.60

Filippidis, K. (GRE)

5.75

18

9.34

3.80

Gibilisco, G. (ITA)

5.65

18

9.07

4.25

Didenkow, M. (POL)

5.75

16(SS)***

9.09

4.48

Straub, A. (GER)

5.65

18

9.35

4.20

Silva, F. (BRA)

5.65

18

9.31

4.45

Lewis, S. (GBR)

5.65

18

9.24

4.25

5.75

18.22

9.18

4.22

Average

5.81

17.50

9.26

4.44

Average*****the velocity has analyzed in the run-up section between 11-6 m from the pole box
AP has analyzed the distance between cut-in box and the last heel strike***

additional 1 short step for preparation first step

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Figure 4 Stick Figure and photo of Wojciechowski P. (POL)
To summarize, the results for men's pole vault run up variables at the Daegu 2011 World
Track and Field Competition show a steady increase when compared to results from the 2009
World Championships in Berlin. Specifically, run up velocity and approach position increased.
This increase in approach position can also indicate that vaulters took a higher grip position
than before, requiring athletes to increase their power. Consequently, run up speed andapproach position have proven to be crucial variables when evaluating pole vault performance.
However, the run up speed and approach position for the first place finisher were relatively
low compared to other top performers, indicating that some other variables outside of thisstudy must account for his winning performance. In order to continue to develop the researcharound pole vault performance, future studies should expand their variables to include
previously excluded factors such as other stages of the vault like plant and take off, swing up,
extension, etc.

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13th IAAF World Championships,
Daegu 2011 Final Report :Women's Pole Vault• Dircector :Kyoo Jeong Choi(Korea Institute of Sport Science (KISS))
Ok Kyung Yi(Professor, Ewha Woman's University, Korea)• Researcher :Nam Hee Kim(Ewha Woman's University Doctoral Candidate, Korea) · Ji Eun Kang(Ewha
Woman's University Doctoral Candidate, Korea) · Hye Lim Kim Ewha Woman's University
Master's Candidate, Korea)

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4. Women's Pole Vault
At the 2011 Daegu World Championships, five sets of video cameras were used to analyze
female pole vaulters (9 competitors) during the final competition. There were two staggered,parallel pole vault pits operating during the competition. Camera three recorded a frontal viewof vaulters at pit A. Camera four captured a frontal view of vaulters at pit B. In the sagittal
plane two cameras were used to record movement for both pits. Camera one covered thevaulter's initial approach, while camera two recorded the final approach and vault. The fifth
camera was used to record statistical information about the vaulters on the stadium's display
screen (Figure 1). DLT sets were used for two-dimensional analysis (Figure 2). Analyticalvariables included total approach distance, number of steps, mean step length, approach
position, and average velocity from 6~11 meters away from the pole box.

recordingFigure 1. The layout of cams 1-5 for recording pole vault competition

Figure 2. The layout of DLT for calibration
Preliminary competition began on a calm morning on August 28th, 2011. 34 athletes wereseparated into group A and group B. The two groups included all ten of the IAAF's top-ten rated
female pole-vaulters, compared to the 2009 Berlin competition, where only eight of the IAAF's

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top-ten competed. Nine of those top ten athletes moved on to the final round of competition.
Qualification height was preset at 4.60m the same as the preset qualifying height for Beijing
and Berlin. From 4.10m, qualifying heights increased to 4.25 m, 4.40 m, 4.50 m, and 4.55 m.
12 athletes qualified for the championship round. In Beijing, preliminary competition began at
4.00 m, increasing to 4.15 m, 4.30 m, 4.40 m and 4.50 m. In Berlin height progression was
the same as in Daegu.
The pole vault championship rounds started at 7:05PM on August 30th, 2011. The averageage of the 9 finalists was 27.9 slightly older than the pole vault finalists in Beijing (26.7) andBerlin (26.7). During the championship rounds three competitors achieved their season's best
vaults (F. Murer; S. Feofanova; J. Ptacnikova), while two other vaulters set personal records(M. Sturutz; Y. Silva) (Table 1).
Table 1. Competition results in relation to season’s best 2011(before the World Championships)
AthleteRank

SB 2011 (m) IAAF WCh Daegu 2011 (m)Difference (%)

Murer, F. (BRA)

1

4.71

4.85

+3.0

Sturutz, M. (GER)

2

4.78

4.80

+0.4

Feofanova, S. (RUS)

3

4.71

4.75

+0.8

Suhr, J. (USA)

4

4.91

4.70

-4.3

Silva, Y. (CUB)

5

4.66

4.70

+0.9

Isinvaeva, E. (RUS)

6

4.76

4.65

-2.3

Ptacnikova, J. (CZE)

7

4.60

4.65

+1.1

Kiriakopoulou, N. (GRE)

8

4.71

4.65

-1.3

Results for analytic variables
Analytic variables for the women's pole vault finalists, such as total run up distance, numberof steps, average step length, and ratio (%) were measured. (Table 2).
Average height of the finalists was 1.69 m. Total run up distance averaged 30.54 m. The
total number of steps averaged 16.25. These numbers was slightly higher than the 2009 Berlin
results (15.88). Average step length was 1.87 m, while the ratio of average step length toheight was 110.8%.

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Table 2. Athlete′s height, total run-up distance, number of run-up steps, average step lengthand the ratio to her height
AthleteMurer, F. (BRA)

Height(m)

Total Run-up
Distance (m)# of Steps(step)

Average Step
Length (m)

Ratio
(%)

1.72

33.19

18

1.84

107.0

1.79

111.9

*

Sturutz, M. (GER)

1.60

30.42

16(SS)

Feofanova, S. (RUS)

1.63

29.54

16

1.85

113.5

Suhr, J. (USA)

1.83

32.27

18

1.79

97.8

Silva, Y. (CUB)

1.61

28.22

14

2.02

125.5

Isinvaeva, E. (RUS)

1.74

31.29

16

1.96

112.6

Ptacnikova, J. (CZE)

1.74

29.22

16

1.83

105.2

Kiriakopoulou, N. (GRE)

1.67

30.20

16

1.89

113.2

Average

1.69

30.54

16.25

1.87

110.8

*

additional 1 short step for preparation first step

Step analysis was divided into three sections: early (the final 12th-9th steps), middle (the final
8th-5th steps), and final (the last 4 to the final step) (Table 3). Since the average number ofsteps for women (16.25) was 1.25 less compared to male pole vaulters (17.50), and since theleast amount of steps for competitor (Y. Silva) was 14, the analytic phases for women's steps
were divided into three stages, with four steps for each stage.
Early average step length was 1.93 m (step length / height ratio: 114.4%), increasing during
middle average step length to 1.94 m (114.9% ratio), and decreasing during final average step
length to 1.92 m (113.3% ratio). Figure 3 shows the average step length according to all threestages for Brazil's F. Murer, the first place vaulter in Daegu.

Figure 3. Each step length for run-up (P. Murer)

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Table 3. Average step length for the section of 12-9 step, 8-5 step and 4-1 step
Average step length ((AthleteHeightMurer, F. (BRA)*(unit : m))Last 12 - 9 step

Last 8 - 5 step

Last 4 - 1 step

1.72

1.89 (109.9)

1.94 (112.8)

1.95 (113.4)

Sturutz, M. (GER)

1.60

1.87 (116.9)

1.77 (110.6)

1.75 (109.4)

Feofanova, S. (RUS)

1.63

1.91 (117.2)

1.80 (110.4)

1.93 (118.4)

Suhr, J. (USA)

1.83

1.91 (104.4)

1.97 (107.7)

1.91 (104.4)

Silva, Y. (CUB)

1.61

2.07 (128.6)

2.11 (131.1)

2.01 (124.8)

Isinvaeva, E. (RUS)

1.74

2.08 (119.5)

2.09 (120.1)

1.94 (111.5)

Ptacnikova, J. (CZE)

1.74

1.82 (104.6)

1.95 (112.1)

1.91 (109.8)

Kiriakopoulou, N. (GRE)

1.67

1.91 (114.4)

1.91 (114.4)

1.92 (115.0)

Average

1.69

1.93 (114.4)

1.94 (114.9)

1.92 (113.3)*) represents the ratio of step length to her height<Table 4> shows the results for vault height (m), number of steps (step), velocity or VA(m/s)(at11m-6m from pole box), and approach position or AP (m) (distance from pole box and final footstrike) from the 2009 World Championships in Berlin alongside the results from Daegu in 2011.
The average vault height for competitors in 2011 in Daegu was 4.72 m, a 14 cm increase
from the 2009 World Championships in Berlin (4.58 m) and a 2cm decrease the 2008
Olympics in Beijing (4.74 m). Approach velocity was the same as 2009 in Berlin at 8.23 m/s.
Approach position was the same as well at 3.62 m.

Figure 4 Stick figure and photo of Murer F. (BRA)
To summarize, the women at the Daegu 2011 World Track and Field Competition achieved
higher average heights than their counterparts at the 2009 World Championships in Berlin. In
terms of run up variables, the number of steps increased, and the approach position for the
first and second place finishers was approximately 0.4 m larger than the average in Berlin.
Thus, number of steps and approach position can be considered as crucial variables for
women's pole vault performance. In order to continue to develop the research around polevault performance, future studies should expand their variables to include previously excluded
factors such as other stages of the vault like plant and take off, swing up, extension, etc.

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Table 4. Jumping height, run-up velocity VA in section 10-5 m, number of run-up steps and take-off position AP
IAAF WCh Berlin 2009

IAAF WCh Daegu 2011
Records(m)# of Steps(step)

VA
(m/s)

*

AP
(m)

Murer, F. (BRA)

4.85

18

8.27

4.04

3.35

Sturutz, M. (GER)

4.80

16(SS)***

8.23

4.10

7.92

3.75

Feofanova, S. (RUS)

4.75

16

8.30

3.40

16

8.33

3.80

Suhr, J. (USA)

4.70

18

8.30

3.54

4.55

16

8.26

3.85

Silva, Y. (CUB)

4.70

14

8.15

3.69

Dennison, K. (GBR)

4.55

14

8.24

3.40

Isinvaeva, E. (RUS)

4.65

16

8.27

3.46

Polnova, T. (RUS)

4.40

17

7.68

3.80

Ptacnikova, J. (CZE)

4.65

16

8.20

3.39

Battke, A. (GER)

4.40

16

8.43

3.55

Kiriakopoulou, N. (GRE)

4.65

16

8.13

3.35

Average

4.58

15.88

8.23

3.62

Average

4.72

16.25

8.23

3.62

AthleteRecords(m)# of Steps(step)

VA
(m/s)

AP
(m)

AthleteRogowska, A. (POL)

4.75

16

8.68

3.45

Johnson, C. (USA)

4.65

16

8.32

Pyrek, M. (POL)

4.65

16

Spiegelburg, S.
(GER)

4.65

Murer, F. (BRA)***

the velocity has analyzed in the run-up section between 10-5 m from the cut-in box
AP has analyzed the distance between cut-in box and the last heel strike***
additional 1 short step for preparation first step**

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Men's High Jump Men - Biomechanics
Research Report from the IAAF WorldChampionships, Daegu 2011

• Dircector :Eui-Hwan Kim(Yongin University, Korea) · Young-Sang Bae(Keimyung University, Korea)• Researcher :Sung-Sup Kim(Yongin University, Korea) · Moon-Seok Kwon(Yongin University, Korea)
Ung-Ryang Wi(Yongin University, Korea) · Ki-Man Kim(Polytechnic College University, Korea)
Jeong-Min Lee(KeimyungUniversity, Korea)

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Abstract
The purpose of this study was to analyze the takeoff techniques of the world’s leading malehigh jumpers (men’s high jump medalists) at the 2011 IAAF Championships in Daegu (2011. 8.
27 - 9. 4). Three-dimensional coordinate methods were used to analyze the athletes’ last three
strides before touchdown, touchdown techniques, and movements after takeoff toward the bar.
First, data analysis showed that gold medalist, J. Williams, used single arm form, while other
medalists used double arm form. Second, the difference between knee joint angles upon
touchdown and toe-off was 10˚. Third, J. Williams achieved a maximum CM height after takeoff(1.26 m) through maximum flexion of his knee joint. Fourth, A. Dmitrik’s duration of foot contact(0.11 sec.) was the shortest among the medalists, and his ratio of transformation of horizontal
velocity toward vertical velocity was the greatest (75.25%). Lastly, T. Barry’s maximum CM
height was the greatest and his foot contact duration was the longest among the medalists.

5. Biomechanicals Analysis of the Men's High Jump Finals
J. Williams (U.S.A.), who holds this year’s best jump of 2.37 meters, won the men’s highjump event at the 2011 IAAF World Championships in Daegu (Figure 1).

Figure 1. J. Williams (USA)J. Williams, a 27 year-old American athlete, made this year his best by clearing all attempts
before the 2.37 meter jump. As a result, he took the gold medal with a height of 2.35 meters.
A. Dmitrik (RUS) earned the silver. A. Dmitrik cleared 2.35 meters as Williams did, but as hecleared 2.29, 2.32, and 2.35 meters on his second attempt, he could not defeat Williams,
placing him at second place. T. Barry from the Bahamas won the bronze with the height of
2.32 meters, which was his personal best.

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To analyze the men’s high jump competition, we placed two high-speed video cameras(Casio EX-F1 Exilim, JPN, 300 frames/sec, shutter speed 1/1000 sec) at the takeoff point andat the landing area. Before videotaping the movement of the athletes, a bar with a control
point was fixed to the 14th point to calibrate three-dimensional coordinates(Figures 2, 3).
Video images of the top three athletes were used for analysis. The variables were footcontact time at takeoff, maximum height of CM, horizontal velocity of CM, horizontal andvertical velocity of CM at takeoff, angle at takeoff, body lean angle, backward lean angle, andknee joint angle at takeoff.
Side camera view

Back camera view

Figure 2. Camera Calibration

Water Level

GroundFigure 3. Camera Calibration Methods
According to the men’s finals results, the average jump height of the top three athletes was
2.34 ± 0.02 m, and the average maximum CM height was 2.65 ± 0.01 m. The average time

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of foot contact at takeoff was 0.15 ± 0.04 seconds. The average takeoff angle toward the bar
was 48.7 ± 1.6°. The average horizontal CG velocity at the actual takeoff was 7.97 ± 0.41
m/s. The mean horizontal and vertical velocities of the jumpers’ CM at the touchdown phasewere 4.31 ± 0.21 m/s and 4.91 ± 0.05 m/s. The average angle of backward body lean at the
moment of touchdown was 34.6 ± 2.5°, inward body lean angle averaged 27.4 ± 2.5°, andbody trunk lean angle averaged 32.8 ± 8.8°. The mean knee joint angle at the last stride was
143.1 ± 4.7° but it decreased to 140.9 ± 7.2° at touchdown; the average angle of the knee
joint was 170.8 ± 8° but it increased to 172.8 ± 3.2° at touchdown. The lowest mean of theknee joint angle was 138.5 ± 14.8°.
In high jump competitions, the jumpers are categorized into Single-Arm (S) and Double-Arm(D) types according to their arm actions at touchdown. Categorizations of Bend (B) andHalf-Bend (HB) are used according to how the jumpers swing their leading legs at touchdown(Ae, 1990). At the 2011 IAAF World Championships in Daegu, the arm action of J. Williams,
the gold medalist, was of the Single-Arm type while the arm actions of A. Dmitrik (silver
medalist) and T. Barry (bronze medalist) were of the Double-Arm type. In addition, the leading
leg action of J. Williams was of the Half-Bend type, while that of the other medalists was of
the Bend type. It can be concluded that the efficient kinematic matching of arm actions andthe actions of leading legs at touchdown are S-HB and D-B.
There was not a big difference between the takeoff body angles of the gold medalist J.
Williams (49.8°) and of the bronze medalist T. Barry (49.4°), but the takeoff body angle of A.
Dmitrik (46.9°), the silver medalist, was significantly lower than the others’. In addition, among
the vertical and horizontal CM velocities, the horizontal velocity of A. Dmitrik was comparably
higher than the other medalists. Though the maximum CM height of A. Dmitrik, 2.64 meters,
was the same as that of the gold medalist, J. Williams, this result demonstrates the added
difficulty in clearing the bar due to the low takeoff angle. In the case of the bronze medalist T.
Barry, he recorded the greatest maximum CM height at 2.66 meters, but his horizontal velocity(7.51 m/s) was slower than that of the gold medalist (8.32 m/s) and the silver medalist (8.07m/s). In 2007 Osaka competition, D. Thomas won the gold medal with the result of 2.35 m
and 7.87 m/s for horizontal velocity. Hence, for a better result, it is necessary to increase thehorizontal velocity. Moreover, J. Williams cleared 2.34 meters, which was the same as theresults of D. Thomas and Y. Rybakov at the 2007 Osaka competition.

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Table 1. Kinematic data of Men’s High Jump finals, IAAF W.C., Daegu 2011

Horizontal

VerticalBack ward

Inward

Trunk

5

2.35

0.14

2.64

8.32

49.8

4.2

4.97

37.4

29.7

36.9

145.4

2

Aleksey Dmitrik
(RUS)

8

2.35

0.11

2.64

8.07

46.9

4.56

4.88

33.5

17.6

23.3

146.2 142.7 174.1 155.3 176.4

3

Trevor Barry
(BAH)

3

2.32

0.19

2.66

7.51

49.4

4.18

4.88

32.8

34.8

38.3

137.7 132.9 176.7 133.1 170.5

2.34

0.15

2.65

7.97

48.7

4.31

4.91

34.6

27.4

32.8

143.1 140.9 170.8 138.5 172.8

Mean

Takeoff angle (deg)Peak Horizontal
CM Velocity (m/s)

Jesse Williams(USA)

AthleteResult (m)

1

R
a
n
k

Analysed attempt

Peak CM height (m)Body lean at takeofffoot touchdown(deg)Foot contact time (ms)CM Velocity
at takeoff(m/s)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

Knee joint angle attakeoff phase(deg)Last Stride

on

off

147

Takeoffonmax
flexionoff

161.7 127.2 171.5

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Gold medalist J. Williams’ maximum horizontal and vertical velocities at the end of the
takeoff phase were 8.32 m/s and 4.97 m/s, which were greater than the velocities of D.
Thomas (7.57 m/s, 4.64 m/s) and Y. Rybakov (7.57 m/s, 4.45 m/s). However, the duration of
J. Williams’ foot contact was 0.14 sec, which was shorter than those of D. Thomas (0.18 sec)
and Y. Rybakov (0.192 sec). This means that J. Williams might have had a better result if he
had taken more time at foot contact, which would have transformed the horizontal energy into
vertical movement.
In this competition, the average backward body lean angle at the point of touchdown was
34.6 ± 2.5°, which was lower than those of the athletes at the 2007 Osaka event, 42.3 ±
2.02°. It can be said that the difference between backward body lean angles was influenced
by the maximum horizontal velocity and the horizontal velocity after touchdown of the
medalists in the 2011 Daegu IAAF Championships. The velocities of the athletes in Daegu
were higher than the velocities of the athletes at the 2007 Osaka competition. Moreover, theaverage physical height of the athletes at the 2007 Osaka event (1.94 ± 0.04 m) was greaterthan that of the medalists at the 2011 Daegu event. J. Williams and A. Dmitrik are both 1.84
m. Because of their shorter stature, they achieve a greater horizontal velocity causing a lower
backward body lean angle at the point of touchdown. This allowed them to perform muchbetter than the athletes in earlier competitions.
At touchdown, J. Williams’ knee joint angle was 161.7°, A. Dmitrik’s was 174.1° and T.
Barry’s was 176.7°. After touchdown, J. Williams’ knee joint angle was 171.5°, A. Dmitrik’s
was 176.4° and T. Barry’s was 170.5°. In 2007, D. Thomas recorded touchdown and post
touchdown angles of 161° and 171°, while Y. Rybakov had angles of 170° and 174°. The gold
medalists, J. Williams in 2011 and D. Thomas in 2007, had the same value of knee joint
angles at and after touchdown. Moreover, the difference between the knee joint angles fromthe moment of touchdown to when foot lost contact was about 10° for both athletes.
Compared to the two gold medalists, the knee joint angles of the other athletes were very
different. In particular, their knee joint angles at the point of touchdown were greater thanthose of the gold medalists. The two gold medalists most actively used their knee joints at the
moment of touchdown. This means that their body movements were efficient enough totransform their horizontal movement into increased vertical movement after takeoff. Moreover,their active knee joint movement at the moment of touchdown led kinetic energy originated bytouchdown toward potential energy. Hence, it can be concluded that their active knee joint
movement contributed to their gold medal performances.

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Side view

Back view

Backward angle

Takeoff on

Takeoff angle

Takeoff max

Takeoff off

Knee Joint Angles
Figure 4. J. Williams (USA)Biomechanics Research Project Report in the IAAF World Championships, Daegu 201152/207

Side view

Back view

Takeoff angle

Takeoff off

Backward angle

Takeoff max

Takeoff onKnee Joint Angles
Figure 5. A. Dmitrik (RUS)

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Side view

Back view

Takeoff angle

Takeoff off

Backward angle

Takeoff max

Takeoff onKnee Joint Angles
Figure 6. T. Barry (BAH)

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Table 2. Results of Men's High Jump, IAAF W.C., Daegu 2011
Place

Name

(unit: cm)

Country

220

225

229

232

235

237

1

Jesse Williams

USA

○

○

○

○

○

×××

2

Aleksey Dmitrik

RUS

○

○

×○

×○

×○

×××

3

Trevor Barry

BAH

○

○

-

○

×××

4

Jaroslav Baba

CZE

○

○

××○

○

×××

5

Ivan Ukhov

RUS

○

○

○

××○

×××

5

Dimitrios Chondrokoukis

GRE

○

○

○

××○

×××

7

Mutaz Essa Barshim

QAT

○

×○

×○

××○

×××

8

Aleksandr Shustov

RUS

○

×○

○

×××

9

Raul Spank

GER

○

○

×○

×××

10

Zhang Guowei

CHN

×○

○

×××

11

Donald Thomas

BAH

○

×××

12

Darvin Edwards

LCA

×○

×××

12

Dmytro Dem'yanyuk

UKR

×○

×××

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Women's High Jump Biomechanics
Research Report from the IAAF WorldChampionships, Daegu 2011

• Director :Young-Sang Bae(Keimyung University, Korea) · Eui-Hwan Kim(Yongin University, Korea)• Researcher :Ki-Man Kim(Polytechnic College University, Korea) · Jeong-Min Lee(Keimyung University, Koea)
Sung-Sup Kim(Yongin University, Korea) · Moon-Seok Kwon(Yongin University, Korea)
Ung-Ryang Wi(Yongin University, Korea)

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Abstract
The purpose of this study was to perform kinematic analysis of the top three women's highjumpers at the IAAF World Championships in Athletics, Daegu 2011. This study also examinedthe current techniques of the world's top women high jumpers. It is notable that competitor
Antonietta Di Martino, despite her shorter height, secured a spot among the top three athletes
by maximizing her movement in her take-off technique. This included her single arm swing
with a half flexed lead leg swing, as well as using a deep arch to clear the bar. The study
also showed that the world's top athletes used the techniques to jump with no decrease in
run-up velocity on the take-off. Furthermore, it appeared that the angle of the knee joint at
take-off directly affected the body position at take-off (H1).

6. Biomechanical Analysis of the Women's High Jump Finals
At the women's high jump finals at the IAAF World Championships, Daegu 2011, the 2011
world record holder Anna Chicherova from Russia won the gold medal. She cleared every
single height on her first attempt, with a range of 1.89 m to 2.03 m. It was her first gold
medal at the IAAF World Championships (Figure 1).

Figure 1. A. Chicherova (RUS)
Blanka Vlasic from Croatia, who had won two earlier IAAF Championships, was rumored not
to appear at the IAAF World Championships in Daegu due to an injury, but in the end, she
was able to participate in the event. Vlasic cleared 2.00 m and then 2.03 m on her second
attempt, but she still needed to clear 2.05 m to defeat Chicherova. However, after three

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attempts she failed to cross the bar, which her competitor Chicherova successfully did. The
bronze medal was awarded to Antonietta Di Martino from Italy, who held the national record.
She cleared 2.00 m on her second attempt.
To analyze the womens high jump competition, we placed two high speed video cameras(Casio EX-F1 Exilim, JPN, 300 frames/sec, shutter speed 1/1000 sec) at the take-off point andat the landing area. Before videotaping the motions of the athletes, a bar with a control point
was fixed to the 14th point to calibrate three-dimensional coordinates (Figure 2, 3).
Video images of the top three athletes were used for the analysis. The variables were footcontact time at take-off, maximum height of CM, horizontal velocity of CM, horizontal andvertical velocity of CM at take-off, angle at take-off, body lean angle, backward lean angle,
and knee joint angle at take-off.
Side camera view

Back camera view

Figure 2. Camera Calibration

Water Level

GroundFigure 3. Camera Calibration Methods

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The average of the top three athletes' final results was 2.12 ± 0.02 m, and the mean of the
maximum CM height was 2.12 ± 0.18 m. The average time of foot contact at take-off was
0.16±0.01 sec. The average take-off angle toward the bar was 48.6 ± 3.2°. At the point of
take-off, the average horizontal velocity of the jumpers' CM was 6.99 ± 0.33 m/s. The mean
horizontal and vertical velocities of the jumpers' CM at the point of touchdown phase were3.66 ± 0.45 m/s and 4.13 ± 0.07 m/s. The average backward body lean angle at touchdown
was 30.5 ± 4.6°, the average inward body lean was 34.3 ± 5.6°, and the average angle of thetrunk of the body was 36.9 ± 5.3°. The mean of the knee joint angle at the last stride was
142.9±6.2°, but it increased to 150.4 ± 9°at touchdown. At touchdown, the angle of the knee
joint was 171 ± 7°, but it decreased 168.7 ± 3.3° upon touchdown. The lowest mean of theknee joint angle was 144.5 ± 10.2°.
The gold medalist, A. Chicherova, recorded a longer foot contact time (0.16 sec.) than B.
Vlasic, the silver medalist, and A. Di Martino, the bronze medalist. Also, the maximum height(2.22 m) of A. Chicherovas CM and her maximum horizontal velocity (7.37 m/s) whencrossing the bar were higher than the other competitors'. The bronze medalist, A. Di Martino,cleared 2 m even though she is shorter (1.69 m) than the others. It is notable that she
brought her CM to a maximum height of 1.97 m when she cleared 2 m. The medalists' bodyangles toward the bar after take-off were 46.6° (A. Chicherova), 46.9° (B. Vlasic), and 52.2° (A.
Di Martino). They all recorded take-off angles greater than 45°. It appears that A. Di Martino s
take-off angle was higher than the others'. After take-off, the mean body angle of the womenhigh jump medalists was similar to that of the men medalists, 48.7°. But at the take-off phase,the body angles of the women gold and silver medalists were 3° smaller than the men
medalists'. In addition, when their touchdown foot lost contact with the ground, the medalists'mean horizontal velocity was over 3 m/s, and their vertical velocity was over 4 m/s. In
particular, A. Chicherova's vertical velocity was 4.18 m/s greater than those of B. Vlasic and
A. Di Martino. Also, the gold medalist's, A. Chicherova's, maximum horizontal velocity was
7.37 m/s, which was greater than other two medalists' horizontal velocities. This meant that A.
Chicherova's body movements were efficient enough to transform her horizontal movement attouchdown into a better vertical movement than those of B. Vlsasic and A. Di Martino.

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Table 1. Kinematic data of Women’s High Jump of finals, IAAF W.C., Daegu 2011
Rank

AthleteAnalysed attempt

Result (m)Foot contact
time
(ms)

Peak CMheight (m)Peak Horizontal
CM Velocity(m/s)

Takeoff angle(deg)

CM Velocity
at takeoff(m/s)
Horizontal

Vertical

Back
ward

InwardTrunkLast Stride

1

Anna Chicherova
(RUS)

5

2.03

160

2.22

7.37

46.6

3.59

4.18

33.2

29.9

33.1

138.2 153.3 163.0 133.4 172.3

2

Blanka Vlasic
(CRO)

7

2.03

150

2.17

6.87

46.9

3.89

4.15

25.2

32.4

34.7

140.7 157.5 174.1 146.9 165.8

3Antonietta Di Martino
(ITA)

6

2.00

140

1.97

6.74

52.2

3.14

4.05

33.1

40.6

42.9

149.9 140.3 175.9 153.3 168.0

2.02

150

2.12

6.99

48.6

3.66

4.13

30.5

34.3

36.9

142.9 150.4 171.0 144.5 168.7

Mean

In the women

Body lean at takeofffoot touchdown(deg)Knee joint angle attakeoff phase (deg)

on

off

Takeoffonmax
flexionoffs competition, the mean backward body lean angle at touchdown was 30.5 ± 4.6° which is smaller than that of the malecompetitors, which was 34.6 ± 2.5°. In particular, B. Vlasic, the former champion, had a similar take-off angle to A. Chicherova, but Vlasic's
maximum horizontal velocity, maximum CM height, and vertical velocity after take-off were lower than those of A. Chicherova. It can be said
that her backward body lean angle (25.2°) was not enough to efficiently transform horizontal movement to vertical movement. Also notable in
A. Chicherova
the mens performance was that her knee joint angle at the point of touchdown and after touchdown was almost same as J. Williams',s high jump champion in Daegu, and D. Thomas', the men's champion at the 2007 Osaka competition. Moreover, the difference

between the maximum and minimum flexion in the knee of Chicherova's take-off leg was about 9°. Female competitors' knee flexion was as
great as the male gold medalists. Lastly, the knee joint angles of B. Vlasic and A. Di Martino at take-off were greater than the actual toe
take-off point. In comparison, A. Chicherova's knee joint angle at the actual toe take-off was greater than it was for J. Williams and D.
Thomas. Hence, this difference in knee joint angle at take-off helped A. Chicherova to receive her gold medal at the IAAF WorldChampionships, Daegu 2011.

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Side view

Back view

Takeoff angle

Takeoff off

Backward angle

Takeoff max

Takeoff onKnee Joint Angles
Figure 4. Chicherova (RUS)

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Side view

Back view

Takeoff angle

Takeoff off

Backward angle

Takeoff max

Takeoff onKnee Joint Angles
Figure 5. B. Vlasic (CRO)

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Side view

Back view

Takeoff angle

Takeoff off

Backward angle

Takeoff max

Takeoff onKnee Joint Angles
Figure 6. A. Di Martino (ITA)

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Table 2. Women's High Jump Results, IAAF W.C., Daegu 2011
Place

Name

(unit: cm)

Country

189

193

197

200

203

205

1

Anna Chicherova

RUS

○

○

○

○

○

×××

2

Blanka Vlasic

CRO

○

○

○

×○

×○

×××

3

Antonietta Di Martino

ITA

○

○

○

××○

×××

4

Elena Slesarenko

RUS

○

×○

○

×××

5

Svetlana Shkolina

RUS

○

○

××○

×××

6

Zheng Xingjuan

CHN

×○

○

×××

6

Deirdre Ryan

IRL

×○

○

×××

8

Svetlana Radzivil

UZB

×○

×○

×××

8

Doreen Amata

NGR

×○

×○

×××

10

Brigetta Barrett

USA

○

××○

×××

11

Emma Green Tregaro

SWE

○

×××

12

Anna Iljustsenko

EST

×○

×××

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2011 IAAF World Championships,
Daegu KSSB Project Final Report
Men’s Long Jump Finals• Director :Jung-Suk Seo(Wonkwang Universit, Korea) · Ho-Mook Kim(Soonchunhyang Universit, Korea)• Researcher :Sang-Yeon Woo(Soonchunhyang University, Korea) · Yong-Woon Kim(Kyungnam University, Korea)
Ki-Jeong Nam(Seoul National University, Korea) · Yong-Hyun Park(Seoul National University, Korea)
Sung-Bum Choi(Soonchunhyang University, Korea) · Jin-Hyuk Kim(Soonchunhyang Universit, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201165/207

7. Biomechanical Analysis of the Men’s Long Jump Finals
D. Phillips won the gold for the men's long jump in Daegu in 2011 with a leap of 8.45 m(Figure 1). During the Championships in Daegu, Phillips was assigned the bib number 1111.
After winning, Phillips proudly pointed to his number, which was appropriate for finishing infirst place in four World Championships. These finishes firmly place him among the event's
all-time greats.

Figure 1. Dwight Phillips (USA) (taken from http://daegu 2011.iaaf.org)
In order to conduct a three-dimensional analysis of the long jump competition, seven digital
cameras (Sony vx2100, Sony Fx, JPN, 60 fields / sec) were installed in the stands. Providing
protection for the cameras from the spectators was essential, so a warning line was used. The
performance distance used for the analysis of the men's long jump was 20 m, which wascomparable with the 2009 IAAF Berlin World Championships reports. The performance
distance consisted of three zones of 7 m. Each zone was covered by two cameras (Figure 2).
An additional camera was used to record the total area in order to verify what happened
during competition.

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Figure 2. Three zones for camera recordings of long jump performances
Before the beginning of the daily competition, three control objects (2 m x 1 m x 1 m) thatcovered each zone (7 m) had to be set up to find control points. This calibration procedure wasrepeated in each zone. The control points were used to calculate DLT parameters for 3-D analysis.
Kwon 3D ver. 3.0 was operated to analyze the athletes' performances in three-dimensional space.
The events and phases that were analyzed for the long jump competition encompassed thefinal three steps before take-off and landing (Figure 3).

Figure 3. Main events and phases of long jumpst

The men’s long jump qualifying rounds began on September 1 , 2011 at 11:32 AM. The
temperature was 28°C with a humidity of 70%. The athletes were divided into group A (18athletes) and group B (17 athletes). Athletes with a qualification distance over 8.15 m and the
top 12 jumpers advanced to the next round. Out of the 35 athletes, three athletes weredisqualified. The 32 remaining athletes had an average distance of 7.86 ± 0.32 m and only 2of them had a distance greater than this. The cut off line for advancement was 8.10 ± 0.08 m.

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nd

The men’s long jump finals began at 19:17 on September 2 , 2011. The temperature was
27°C with a humidity of 64%. There was a 0.02 m difference between the average distancefor the top eight ranked long jump athletes at the 2011 Daegu World Championships and theaverage at the 2009 Berlin World Championships. The average in Daegu was 8.26 ± 0.09 m,
while the average in Berlin was 8.24 ± 0.19 m.
Table 1. Competition results in relation to 2011 season’s best (before the World Championships)
SB
Difference
IAAF WC
Name
Rank
Daegu 2011 (m)2011 (m)(%)
Phillips, D.(USA)
1
8.32
8.45
1.6
Watt, M.(AUS)

2

8.54

8.33

-2.5

Makusha, N.(ZIM)

3

8.40

8.29

-1.3

Berrabah, Y.(MAR)

4

8.37

8.23

-1.7

Manyonga, L.(RSA)

5

8.26

8.21

-0.6

Menkov, A.(RUS)

6

8.28

8.19

-1.1

Tomlinson, C.(GBR)

7

8.35

8.19

-1.9

Bayer, S.(GER)

8

8.17

8.17

0.0

Table 2. Kinematic data of men’s long jump finals
Distance (m)Loss at take-off(toe-to-board)

Loss by landing

3last

2last

1last

2last/3last

1last/2last

Watt, M./2nd

Real distancePhillips, D./2nd

Relativelength (%)

Officially measured

Name/Attempt

Stride length (m)

8.45

8.48

0.03

0

2.15

2.36

1.99

110

84

8.33

8.36

0.03

0

2.34

2.53

2.42

108

96

st

Makusha, N./1

8.29

8.42

0.13

0

2.22

2.57

2.22

116

86

Berrabah, Y./2nd

8.23

8.23

0.00

0

2.23

2.62

2.24

117

85

Manyonga, L./1st

8.21

8.24

0.03

0

2.14

2.26

2.27

106

100

Menkov, A./2nd

8.19

8.22

0.03

0

2.21

2.34

2.01

106

86

Tomlinson, C./2nd

8.19

8.25

0.01

0

2.28

2.75

2.34

121

85

Bayer, S./1

8.17

8.30

0.13

0

2.07

2.24

2.06

108

92

Mean ± S.D

8.26
±
0.09

8.31
±
0.10

0.05
±
0.05

0
±
0.00

2.21
±
0.08

2.46
±
0.18

2.19
±
0.16

112
±
5.71

89
±
6.02

st

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3last

2last

1last

Take-off instant

Loss at take-off

Vertical velocity
at take-off

Lowering of CM

Velocity of CM (m/s)

Phillips, D./2nd

0.12

10.81

10.09

11.08

9.27

1.81

2.92

Watt, M./2nd

0.09

10.46

9.77

10.82

8.39

2.43

3.60

Makusha, N./1st

0.08

10.60

9.76

11.12

9.66

1.46

2.70

Berrabah, Y./2nd

0.06

10.16

9.31

10.56

8.78

1.78

3.20

Manyonga, L./1st

0.10

9.73

9.17

10.22

8.85

1.37

3.05

Menkov, A./2nd

0.10

10.49

9.87

10.62

8.93

1.69

3.05

Tomlinson, C./2nd

0.06

10.40

9.70

10.59

9.07

1.52

2.89

Bayer, S./1st

0.09

10.29

9.34

10.49

9.06

1.43

2.94

Mean ± S.D

0.09± 0.0210.37± 0.32

9.63± 0.32

10.69± 0.309.00± 0.371.69± 0.343.04± 0.27

Name/Attempt

Take-off

Trunk angle (°)

Knee angle (°)

Hip angle (°)

Mean ± S.D

Distance (m)stBayer, S. 1

Average velocity
(°/s)

nd

Tomlinson, C. 2

Thigh-angle attake-off (°)

nd

Menkov, A. 2

Angle of take-off(°)

stManyonga, L. 1

Minimalknee-angle (°)

ndBerrabah, Y. 2

Trunk rotation(°)

st

Makusha, N. 1

Trunk-angle (°)

nd

Watt, M. 2

Inclination angle(°)

ndPhillips, D. 2

Landing

Duration (s)Name/Attempt

Lead leg

0.11

31

90

9

152

17.3

-22

863

0.45

32

152

77

0.11

23

87

11

161

22.8

-19

708

0.44

62

144

72

0.10

31

90

15

151

15.3

-12

811

0.59

85

138

86

0.13

32

86

10

167

20.0

2

950

0.53

94

108

104

0.15

33

81

25

153

18.8

-7

778

0.48

72

110

90

0.13

34

87

14

160

18.6

-18

683

0.50

69

131

84

0.13

29

99

17

163

17.2

-8

730

0.61

96

139

83

0.13

27

88

8

149

17.6

-11

728

0.47

61

164

80

0.12

30

89

14

157

18.5

-12

781

0.51

71

136

85

± 0.02 ± 3.59 ± 5.10 ± 5.55 ± 6.57 ± 2.24 ± 7.65 ± 89.86 ± 0.06 ± 20.93 ± 19.19 ± 9.58

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The men’s mean final results were as follows: officially measured distance 8.26 ± 0.09 m,
real distance 8.31 ± 0.10 m, and loss at take-off distance 0.05 ± 0.05 m. The mean stride
lengths were as follows: 3last 2.21 ± 0.08 m, 2last 2.46 ± 0.18 m, and 1last 2.19 ± 0.16 m.
Moreover, relative landing stride length had mean results of 2last/3last 112 ± 5.71% and1last/2last 89 ± 6.02%. Additionally, lowering of center of mass (CM) had a mean length of
0.09 ± 0.02 m.
Mean velocities of the CM were as follows: take-off instant 9.00 ± 0.37 m/s; loss at take-off
1.69 ± 0.34 m/s; and vertical velocity at take-off 3.04 ± 0.27 m/s. Moreover, take-off duration
had a mean time of 0.12 ± 0.02 s.
At take-off, the mean relative angles of body segments were as follows: inclination angle 30± 3.59°, trunk angle 89 ± 5.10°, trunk rotation 14 ± 5.55°, minimal knee angle 157 ± 6.57°,
and angle of take-off 18.5 ± 2.24°. Additionally, the mean landing distance was 0.51 ± 0.06 m.
The defending champion in Daegu was D. Phillips. He had won the 2009 Berlin WorldChampionships with a distance of 8.54 m. He maintained his position in Daegu with aperformance of 8.45 m, 0.09 m shorter than his winning performance in Berlin. Two athletesth(D. Phillips & S. Bayer) performed their season's best in Daegu. S. Bayer took 8

place inthis competition. However, most of the athletes, excluding two, underperformed by 0.10 m
when compared to their season’s best.
All of the medalists had a 2last stride length greater than their 3last and 1last stride lengths.
When comparing the stride lengths of the male medalists to the female athletes at the 2011
IAAF World Championships, Daegu, we found that the women also had a 2last stride length
greater than their 3last and 1last stride lengths. This result implies that relative 2last stride
length is an important factor in achieving greater distance. This pattern of stride lengths results
in a relatively high vertical CM during the 3last and 1last strides and a lower CM for the 2last
stride, which creates a ramp effect to aid in projecting the CM upward for take-off.
When looking at the kinematic variables of the three men’s long jump medalists at the 2011
IAAF World Championships, we found that gold medalist D. Phillips’ take-off horizontal velocity
was higher than what he achieved at the Berlin competition by 0.04 m/s. Even though thelong jump distance is highly correlated to the take-off velocity, he was not able to achieve afurther distance with higher horizontal velocity.
D. Phillips, who won gold, achieved a longer jump (0.12 m) in comparison to the second
place finisher. This was greater than the Berlin competition by 0.06 m. Furthermore, the 3
medalists’ average knee angle of 154° at take-off was 4° less than the non-medalists. In orderto get a medal, the other athletes would have needed greater knee flexion at take-off.
In contrast to the average landing distance of 0.51 m for the 8 finalists, gold medalist D.

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Phillips and silver medalist M. Watt achieved landing distances of 0.45 m and 0.44 m
respectively.

Figure 4. American gold medalist Dwight Phillips (C), poses on the podium with Australiansilver medalist Mitchell Watt (L) and Zimbabwean bronze medalist Ngonidzashe
Makusha (R) during the award ceremony for the men's long jump event

Figure 5. Phillips, D. 2nd Attempt (8.45 m)

Figure 6. Watt, M. 2nd Attempt (8.33 m)

Figure 7. Makusha, N. 1st Attempt (8.29 m)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201171/207

Figure 8. Berrabah, Y. 2nd Attempt (8.23 m)

Figure 9. Manyonga, L. 1st Attempt (8.21 m)

Figure 10. Menkov, A. 2nd Attempt (8.19m)

Figure 11. Tomlinson, C. 2nd Attempt (8.19 m)

Figure 12. Bayer, S. 1st Attempt (8.17 m)

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2011 IAAF World Championships,
Daegu KSSB Project Final Report
Women’s Long Jump Finals• Director :Jung-Suk Seo(Wonkwang University, Korea) · Ho-Mook Kim(Soonchunhyang University, Korea)• Researcher :Sang-Yeon Woo(Soonchunhyang University, Korea) · Yong-Woon Kim(Kyungnam University,
Korea) · Ki-Jeong Nam(Seoul National University, Korea) · Yong-Hyun Park(Seoul National
University, Korea) · Sung-Bum Choi(Soonchunhyang University, Korea) · Jin-Hyuk
Kim(Soonchunhyang University, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201173/207

8. Biomechanical Analysis of the Women’s Long Jump Finals
With only one valid jump in the women’s long jump finals, B. Reese took the gold medal at
the 2011 IAAF World Championships in Daegu. In the final round, she made her successful
initial leap of 6.82 m and five invalid attempts. It was an odd situation because this was thefirst case of the World Championships women's long jump final being captured during a
finalist’s first and only jump.

Figure 1. Brittney Reese (USA) (taken from http://daegu2011.iaaf.org)

In order to conduct a three - dimensional analysis of the long jump competition, seven digital
cameras were installed (Sony vx2100, Sony Fx, JPN, 60 fields / sec) at the stands. Providing
protection for the cameras from spectators was essential, so a warning line was used. The
performance distance used for the analysis of the women's long jump was 18 m which wascomparable with the 2009 IAAF Berlin World Championship reports. The performance distance (18m) consisted of three zones. Each zone was covered by two cameras (Figure 2). An additional
camera was used to record the total area in order to verify what happened during competition.
Before the beginning of the daily competition, three control objects (2 m x 1 m x 1 m) thatcovered each zone (6~7 m) had to be set up to find control points. This calibration procedure wasrepeated in each zone. The control points were used to calculate DLT parameters for 3-D analysis.
Kwon 3D ver. 3.0 was operated to analyze the athletes' performances in three dimensional space.
The events and phases that were analyzed for the long jump competition encompassed the final
three steps before take-off and the landing (Figure 3).

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201174/207

Figure 2. Three zones for camera recordings of long jump performances

Figure 3. Main events and phases of long jump
The women’s long jump qualifying round began on August 27th 2011 at 21:11. The
temperature was 25°C and the humidity was 68%. The athletes were divided into group A(17athletes) and group B(18 athletes). Athletes with a qualification record over 6.75m and the top
12 finishers advanced to the next round. Out of the 35 athletes, one athlete was disqualified.
The 34 remaining athletes had an average distance of 6.38 ± 0.31 m, and only 5 of them had
a distance over this. The cut off line for advancement was 6.67 ± 0.12.
The women’s long jump finals began at 18:08 on August 28th, 2011. The temperature was
26°C with a humidity of 67%. There was a 0.22 m difference between the average distancefor the top eight ranked long jump athletes at the 2011 Daegu World Championships (IAAF
WC) and the average at the 2009 Berlin World Championships. The average in Daegu was
6.64 ± 0.14 m, while the average in Berlin was 6.86 ± 0.16 m.

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Table 1. Competition results in relation to 2011 season’s best (before the World Championships)
Rank

SB
2011 (m)IAAF WC
Daegu 2011 (m)Difference(%)

Reese, B. (USA)

1

7.19

6.82

-5.1

Kucherenko, O. (RUS)

2

6.86

6.77

-1.3

Radevica, I. (LAT)

3

6.60

6.76

2.4

Mironchyk-I, N. (BLR)

4

6.85

6.74

-1.6

Kluft, C. (SWE)

5

6.73

6.56

-2.5

Deloach, J. (USA)

6

6.99

6.56

-6.2

Klishina, D. (RUS)

7

7.05

6.50

-7.8

Mey Melis, K. (TUR)

8

6.66

6.44

-3.3

Stride length (m)Relativelength (%)

NameTable 2. Kinematic data of women’s long jump finals
Distance (m)Mean ± S.D.

1last/2lastnd

Mey Melis, K./2

2last/3lastthKlichina, D./5

1last

th

Deloach, J./6

2last

rd

Kluft, C./3

3last

rd

Mironchyk-I, N./3

Loss by landingth

Radevica, I./6

Loss at take-off(toe-to-board)thKucherenko, O./4

Real distancest

Reese, B./1

Officially measured

Name/Attempt

6.82

6.93

0.11

0.00

1.98

2.41

1.95

122

81

6.77

6.82

0.05

0.00

2.12

2.33

2.21

110

95

6.76

6.85

0.07

0.00

2.16

2.41

2.18

112

90

6.74

6.79

0.05

0.00

2.14

2.34

2.15

109

92

6.56

6.65

0.09

0.00

2.12

2.13

2.00

100

94

6.56

6.80

0.24

0.00

2.20

2.31

2.18

105

94

6.50

6.61

0.11

0.00

2.28

2.32

1.96

102

84

6.44

6.54

0.10

0.00

2.11

2.21

2.16

105

98

6.64

6.75

0.10

0.00

2.14

2.31

2.10

108

91

± 0.14± 0.13± 0.06± 0.00± 0.09± 0.10± 0.11± 6.92± 5.78

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3last

2last

1last

Take-off instant

Loss at take-off

Vertical velocity
at take-off

Lowering of CM

Velocity of CM (m/s)

0.12

9.71

9.69

9.56

7.82

1.74

3.05

0.05

9.20

9.28

9.48

7.72

1.76

3.07

0.07

9.17

9.12

9.44

7.87

1.57

2.95

0.03

9.08

9.12

9.41

8.10

1.31

2.94

0.05

9.26

8.31

9.51

7.81

1.70

2.78

0.09

9.21

9.26

9.47

7.57

1.90

2.99

0.07

9.24

9.15

9.50

7.82

1.68

2.75

Mey Melis, K./ 2

0.07

8.91

9.05

9.15

7.70

1.45

3.14

Mean ± S.D.

0.07
± 0.039.22± 0.23

9.12± 0.389.44± 0.137.80± 0.151.64± 0.192.96± 0.14

Name/AttemptstReese, B. /1

thKucherenko, O./ 4thRadevica, I./ 6

rdMironchyk-I, N./3
rd

Kluft, C./ 3thDeloach, J./ 6thKlichina, D./ 5

ndTake-off

Trunk angle (°)

Knee angle (°)

Hip angle (°)

Mean ± S.D.

Distance (m)ndMey Melis, K./2

Average velocity
(°/s)

th

Klichina, D./5

Thigh-angle attake-off (°)

thDeloach, J./6

Angle of take-off(°)

rd

Kluft, C./3

Minimalknee-angle (°)

rdMironchyk-I, N./3

Trunk rotation(°)

thRadevica, I./6

Trunk-angle (°)

thKucherenko, O./4

Inclination angle(°)

stReese, B. /1

Landing

Duration (s)Name/Attempt

Lead leg

0.13

28

80

14

133

21.0

-19

694

0.53

75

136

83

0.13

29

103

12

156

21.9

-21

673

0.58

98

120

94

0.11

27

89

13

154

20.4

-12

726

0.55

77

144

71

0.11

27

102

9

146

20.0

-21

684

0.54

76

141

72

0.13

29

91

7

163

19.1

-7

761

0.51

75

136

83

0.11

26

88

15

156

21.3

-29

591

0.34

33

126

80

0.13

30

97

15

151

20.0

-11

699

0.49

68

114

96

0.11

27

90

12

150

22.1

-8

755

0.47

87

134

80

92

12

151

20.7

-16

698

0.50

74

131

82

0.12

28

± 0.01±1.36± 7.88 ± 2.85 ± 8.89 ± 1.03 ± 7.57 ± 53.69 ± 0.07 ± 18.75 ± 10.45 ± 9.03

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The women’s mean final results were as follows: officially measured distance 6.64 ± 0.14 m,
real distance 6.75 ± 0.13 m, and loss at take-off distance 0.10 ± 0.06 m. The mean stride
lengths were as follows: 3last 2.14 ± 0.09 m, 2last 2.31 ± 0.10 m, 1last 2.10 ± 0.11 m.
Moreover, relative landing stride length had mean results of 2last/3last 108 ± 6.92%, and1last/2last 91 ± 5.78%. Additionally, lowering of center of mass (CM) had a mean length of
0.07 ± 0.03 m.
Mean velocities of the CM were as follows: take-off instant 7.80 ± 0.15 m/s, loss at take-off
1.64 ± 0.19 m/s, and vertical velocity at take-off 2.96 ± 0.14 m/s. Moreover, take-off duration
had a mean time of 0.12 ± 0.01 s.
At the take-off, the mean relative angles of body segments were as follows: inclination angle
28 ± 1.36°, trunk angle 92 ± 7.73°, trunk rotation 12 ± 2.85°, minimal knee angle 151 ± 8.89°,
and angle of take-off 20.7 ± 1.03°. Additionally, the mean landing distance was 0.50 ± 0.07 m.
The defending champion in Daegu was B. Reese. She had won the 2009 Berlin WorldChampionships with a distance of 7.10 m. She maintained her position in Daegu with aperformance of 6.82 m, 0.28 m shorter than her performance in Berlin. Only I. Radevica had
a season's best performance of 6.76 m. She took third place in this competition. Every athlete,excluding I. Radevica, underperformed by 0.27 m compared to their season’s best score.
Out of the three medalists, B. Reese and I. Radevica had the greatest 2last stride lengths.
In addition, B. Reese had the greatest 2last/3last ratio and the least 1last/2last ratio. When
comparing the stride length of the female medalists to those of the male medalists at the 2011
IAAF World Championships Daegu, both groups had a 2last stride length greater than their
3last and 1last stride lengths. This result implies that relative 2last stride length is an
important factor in achieving greater distance.
When looking at the kinematic variables of the three women’s long jump medalists at the2011 IAAF World Championships, Daegu, gold medalist, B. Reese’s, take-off horizontal
velocity was lower than what she achieved at the Berlin competition by 0.49 m/s. Her distancein Daegu was 0.28 m shorter than in Berlin. Because the long jump is highly correlated to thetake-off velocity, she was not able to achieve a longer distance with lower velocity.
B. Reese, who won gold, achieved a greater lowering of CM (0.12 m) compared to theother athletes. This distance was greater than her lowering of CM in the Berlin competition by
0.03 m. Considering that the average lowering of CM for the best performance of the 8
finalists was 0.07 m, this was a prominent difference.
Furthermore, B. Reese’s minimal knee angle at take-off was 133°, 18° less than the averageof the 8 finalists’ best performances. In order for her to win the gold medal, she needed tohave the greatest angle of knee flexion at take-off.

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O. Kucherenko, who won silver, recorded the greatest landing distance of 0.58 m. Gold
medalist B. Reese and bronze medalist I. Radevica achieved landing distances of 0.53 m and0.55 m, respectively. Considering the average landing distance of the best performances of
the 8 finalists was 0.50 m, all the medalists had a greater landing distance than average.

Figure 4. Gold medalist Brittney Reese of the U.S. (C), silver medalist Olga Kucherenko of
Russia (L) and bronze medalist Ineta Radevica of Latvia (R) pose with their medals(taken from http://www.daylife.com)

Figure 5. Reese, B. 1st Attempt (6.82 m)

Figure 6. Kucherenko, O. 4th Attempt (6.77 m)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201179/207

Figure 7. Radevica, I. 6th Attempt (6.76 m)

Figure 8. Kluft, C. 3rd Attempt (6.56 m)

Figure 9. Deloach, J. 6th Attempt (6.56 m)

Figure 10. Klichina, D. 5th Attempt (6.50 m)

Figure 11. Mey Melis, K. 2nd Attempt (6.44m)

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Men's Triple Jump Biomechanics
Research Report from the
IAAF World Championships Daegu, 2011

• Director :Sang-Yeon Woo, Ph.D(Soonchunhyang University, Korea)
Yong-Woon Kim, Ph.D(Kyungnam University, Korea)• Researcher :Jung-Suk Seo, Ph.D(Wonkwang University, Korea) · Ho-Mook Kim, Ph.D(Soonchunhyang
University, Korea) · Ki-Jeong Nam(Seoul National University, Graduate School, Korea) ·Yong-Hyun Park(Seoul National Universi ty, Graduate School, Korea) · Sung-Bum
Choi(Soonchunhyang University, Graduate School, Korea) · Jin-Hyuk Kim(Soonchunhyang
University, Graduate School, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201181/207

9. Biomechanical Analysis of the Men’s Triple Jump Finals
th

13

th

IAAF World Championships in Athletics, Daegu on September 4 , 2011

The young athlete Christian Taylor (USA), 21 years old, won the gold medal at the men’s
triple jump event with a spectacular performance of 17.96 m (Figure 1). As a result, defending
world champion Phillips Idowu was left with the silver.

Figure 1. Christian Taylor (USA) (taken from http://daegu2011.iaaf.org)
Before the start of the competition, four control boxes (1 m × 1 m × 2 m) were set up to
calibrate the three dimensional coordinates (Figure 2).
In order to conduct a three dimensional analysis of the triple jump competition, seven digital
cameras with a shutter speed of 1/1000 sec (Sony vx2100, Sony Fx, JPN, 60 fields/sec) were
installed at the stands. Protecting the cameras from the spectators was essential, so awarning line was used. The performance distance used for the analysis of the men’s triple
jump was 26 m, which was comparable with the 2009 IAAF Berlin World Championships

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201182/207

reports. The performance distance consisted of three zones (9 m, 9 m, 9 m). A 0.5 m overlap
occurred between zones 1 and 2 and between zones 2 and 3 (Figure 3). Each zone wascovered by two cameras (Figure 2). An additional camera was used to record the total area inorder to verify what happened during competition.
Temporal variables; hop, step and jump time; spatial variables; horizontal and vertical velocity
at landing and take-off; and hop, step and jump distances for each trial were calculated.

Figure 2. Set-up of control frames & cameras

Figure 3. Three zones for recording triple jump performances

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1. Kinematic variables of the top 8 athletes - 1
Jump distance (m)Stride length (m)Name / Attempt
off.

real

loss

2L

1L

Hop

Step

Jump

th

17.96

18.10

0.14

2.40

2.37

6.19

5.29

6.62

th

17.77

17.77

0.14

2.52

2.24

6.67

5.64

5.60

rd

17.50

17.67

0.17

2.42

2.31

5.77

5.43

6.47

Copello A. 5

th

17.47

17.62

0.15

2.51

2.35

6.40

5.38

5.84

st

17.35

17.46

0.11

2.39

2.25

6.44

5.18

5.84

st

17.23

17.45

0.22

2.63

2.54

6.37

5.09

5.99

th

17.21

17.59

0.38

2.59

2.41

6.63

4.77

6.19

17.17

17.48

0.31

2.62

2.59

6.32

5.23

5.93

Taylor C. 4
Idowu P. 4

Claye W. 3

Evora N. 1

Olsson C. 1

Sandsa L. 5

Compaore B. 3

rdRelative distance (%)

Horizontal velocity (m/s)

Name / AttemptTaylor C. 4

thIdowu P. 4thrdClaye W. 3

thCopello A. 5
Evora N. 1

stOlsson C. 1

stthSandsa L. 5

rdCompaore B. 3

Hop

Step

Jump

2L

1L

Hop

Step

Jump

34

29

37

10.25

10.57

9.70

8.61

7.33

37

32

31

10.36

10.62

9.65

8.11

6.53

33

31

36

10.08

10.27

9.77

8.57

7.33

36

31

33

9.99

9.94

8.14

7.96

6.71

37

30

33

10.16

10.19

9.49

8.35

6.67

37

29

34

9.95

10.16

9.35

8.07

7.33

38

27

35

10.18

10.28

9.36

8.43

7.50

36

30

34

10.43

10.66

9.71

8.26

6.91

Loss of horizontal velocity (m/s)

Vertical velocity (m/s)

Angle of take-off (°)〫

Hop

Step

Jump

Hop

Step

Jump

Hop

Step

Jump

0.87

1.09

1.28

1.78

1.92

2.43

10.3

12.6

18.3

0.97

1.54

1.58

2.15

2.05

2.6

12.6

14.3

21.8

0.50

1.20

1.24

1.85

1.99

2.76

10.7

13.1

20.8

Copello A. 5

1.80

0.18

1.25

1.88

2.05

2.59

14.1

14.6

21.3

Evora N. 1st

0.70

1.14

1.68

2.27

1.89

2.45

13.4

12.8

20.2

0.81

1.28

0.74

2.13

1.87

2.16

12.8

13.1

16.5

Sandsa L. 5

0.92

0.93

0.93

2.2

1.68

1.81

13.2

11.4

13.9

Compaore B. 3rd

0.95

1.45

1.35

1.97

2.04

2.18

11.6

13.8

18.4

Name / AttemptTaylor C. 4
Idowu P. 4thth

Claye W. 3

rd
th

st

Olsson C. 1

thBiomechanics Research Project Report in the IAAF World Championships, Daegu 201184/207

2. Kinematic variables of the top 8 athletes - 2
Name / AttemptTaylor C. 4th
Idowu P. 4

thClaye W. 3rdthCopello A. 5
Evora N. 1

stst

Olsson C. 1

thSandsa L. 5

rdCompaore B. 3

Duration of the support phase (s)Minimal knee angle (°) at contact phase

Hop

Step

Jump

Hop

Step

Jump

0.13

0.17

0.18

149

139

133

0.13

0.17

0.18

137

140

133

0.13

0.17

0.17

146

139

149

0.15

0.18

0.20

137

132

139

0.13

0.17

0.20

147

145

138

0.13

0.18

0.20

152

137

143

0.13

0.18

0.18

146

136

141

0.13

0.17

0.18

147

142

149

Inclination angle at touch-down (°)
Name / AttemptTaylor C. 4
Idowu P. 4thth

Claye W. 3

rdCopello A. 5th
Evora N. 1

stst

Olsson C. 1

Sandsa L. 5thrdCompaore B. 3

Name / Attempt

Trunk angle (°)

Hop

Step

Jump

Hop
↓

Hop
↑

Step
↓

Step
↑

Jump
↓

Jump
↑

15

20

21

88

88

93

80

88

77

21

21

24

93

91

92

78

88

66

16

20

20

84

87

90

88

87

84

19

21

20

88

88

93

82

86

70

21

18

26

87

86

85

78

80

72

19

23

23

90

80

90

77

86

74

17

24

17

88

87

85

81

86

83

15

21

19

90

88

92

87

89

74

Average velocity of the leadleg (°/s)

Landing

Hop

Step

Jump

dist.
(m)

knee angle(°)

hip angle(°)

trunk angle
(°)

614

571

465

0.52

133

82

63

582

527

481

0.30

168

48

60

556

593

516

0.49

147

74

34

627

585

466

0.37

115

92

66

522

449

502

0.47

142

75

28

508

491

488

0.53

158

65

44

Sandsa L. 5

664

525

511

0.70

151

77

81

Compaore B. 3rd

571

550

482

0.68

121

91

94

Taylor C. 4
Idowu P. 4thth

Claye W. 3rdthCopello A. 5
Evora N. 1

stst

Olsson C. 1

thBiomechanics Research Project Report in the IAAF World Championships, Daegu 201185/207

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201186/207

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201187/207

nd

The triple jump event for male qualifiers began at 10:26 AM. on September 2 , 2011. The
temperature was 25° Celsius with a humidity of 74%. There were two groups of athletes, with
16 athletes in group A and 15 athletes in group B.
Athletes with a qualification distance of over 17.10 m and the top 12 qualifiers advanced to thenext round. Of the 31 athletes, 5 were disqualified. The 26 who remained had an average distanceof 16.69 ± 0.44 m. Only 7 of these athletes had a distance greater than this. The cut off line foradvancement was 17.07 ± 0.16 m, which was only 0.38 m longer than the average distance. Alexis
COPELLO (CUB) was ranked first, Nelson EVORA (POR) was ranked second, and Will CLAYE(USA) was ranked third. These three athletes had an average distance of 17.23 ± 0.07 m, which
was 0.16 m longer than the qualification distance and 0.54 m longer than the average distance ofthe other qualifying athletes.
The finals of the men’s triple jump began at 7:02 AM. on September 4th, 2011. The temperature
was 27° Celsius with a humidity of 54%.
There was a 0.18 m difference between the average distance of the top eight finishers at the2011 Daegu World Championships and the average distance of the top eight finishers at the2009 Berlin World Championships. The average from the Daegu World Championships was 17.46± 0.28 m, while the average from the Berlin World Championships was 17.28 ± 0.29 m.
Number one ranked Christian TAYLOR’s (USA) distance of 17.96 m from the Daegu WorldChampionships was 0.23 m longer than Phillips IDOWU’s (GBR) Berlin distance of 17.73 m.
The top four athletes at the 2009 Berlin World Championships were Phillips IDOWU (GBR),
Nelson EVORA (POR), Alexis COPELLO (CUB), and Leevan SANDS (BAH), who were ranked
second, fifth, fourth and seventh respectively at the Daegu World Championships.
The hop, step and jump phases with the stride length relative distance were classified into
the hop-dominated technique, the balanced technique and the jump-dominated technique.
Number one ranked Christian TAYLOR (USA) and number three ranked Will CLAYE (USA)used the relatively jump-dominated technique, while the remaining top athletes used therelatively hop-dominated technique.
The horizontal velocity at take-off of the top eight finishers at the 2011 Daegu WorldChampionships averaged: 2L (10.18 ± 0.17 m/s), 1L (10.34 ± 0.26 m/s), Hop (9.40 ± 0.53 m/s),
Step (8.30 ± 0.24 m/s), and Jump (7.04 ± 0.38 m/s). All of these averages were high whencompared to the 2009 Berlin World Championships, where the averages were: 2L (10.13 ± 0.23 m/s),
1L (10.14 ± 0.21 m/s), Hop (9.38 ± 0.20 m/s), Step (8.29 ± 0.14 m/s), and Jump (6.99 ± 0.22 m/s).
The vertical velocity at take-off for the top eight ranked athletes at the 2011 Daegu WorldChampionships averaged: Hop (2.03 ± 0.18 m/s), Step (1.94 ± 0.13 m/s), and Jump (2.37 ±0.31 m/s). All of these averages were low when compared to the 2009 Berlin World

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201188/207

Championships, where the averages were: Hop (2.48 ± 0.13 m/s), Step (2.06 ± 0.19 m/s), andJump (2.63 ± 0.23 m/s).
The take-off angle for the top eight ranked athletes at the 2011 Daegu World Championships foreach phase averaged: Hop (12.34 ± 1.34°), Step (13.21 ± 1.02°), and Jump (18.90 ± 2.69°).
The averages at the 2009 Berlin World Championships were: Hop (14.75 ± 1.04°), Step (14.00± 1.51°), and Jump (20.63 ± 2.39°), which were all higher for all phases than at the Daegu
Championships.
Finally, the duration of the support phase for the top eight ranked athletes at the 2011
Daegu World Championships was: Hop (0.13 ± 0.01 s), Step (0.17 ± 0.01 s), and Jump (0.19± 0.01 s). The average for the 2009 Berlin World Championships was: Hop (0.12 ± 0.01 s),
Step (0.15 ± 0.01 s), and Jump (0.17 ± 0.01 s), all of which increased at the Daegu
Championships for all phases.

3. Stick figures of the top 8 athletes
Rank 1 : Taylor C. 4th 17.96 m

Rank 2 : Idowu P. 4th 17.77 m

Rank 3 : Claye W. 3rd 17.50 m

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201189/207

Rank 4 : Copello A. 5th 17.47 m

stRank 5 : Evora N. 1 17.35 m

Rank 6 : Olsson C. 1st 17.23 m

Rank 7 : Sandsa L. 5th 17.21 m

Rank 8 : Compaore B. 3rd 17.17 m

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Women's Triple Jump Biomechanics
Research Report from the
IAAF World Championships Daegu, 2011

• Director :Sang-Yeon Woo(Soonchunhyang University, Korea)
Yong-Woon Kim(Kyungnam University, Korea)• Researcher :Jung-Suk Seo(Wonkwang University, Korea) · Ho-Mook Kim(Soonchunhyang University, Korea)
Ki-Jeong Nam(Seoul National University, Graduate School, Korea) · Yong-Hyun Park(Seoul National
University, Graduate School, Korea) · Sung-Bum Choi(Soonchunhyang University, Graduate School,
Korea) · Jin-Hyuk Kim(Soonchunhyang University, Graduate School, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201191/207

10. Biomechanical Analysis of the Women’s Triple Jump Finalsth13

IAAF World Championships in Athletics - Daegu on September 4, 2011

Olha Saladuha won the gold medal in the women’s triple jump in Daegu in 2011 with a distanceof 14.94 m (Figure 1). Surprisingly, she continues on post-childbirth to secure her second big title.
Following the birth of her daughter in 2009, Saladuha has shown the best form of her career.
Before 2009, Saladuha had consistently improved as a jumper but had not won a big title.
However, last year she won the European title. Her win in Daegu was her first global title.

Figure 1. Olha Saladuha (Ukraine) (taken from http://daegu 2011.iaaf.org)
Before the start of the competition, four control boxes (1 m × 1 m × 2 m) were set up to
calibrate the three dimensional coordinates (Figure 2).
In order to conduct a three dimensional analysis of the triple jump competition, seven digital
cameras with a shutter speed of 1/1000 sec (Sony vx2100, Sony Fx, JPN, 60 fields/sec) were
installed at the stands. Protecting the cameras from the spectators was essential, so awarning line was used. The performance distance used for the analysis of the women’s triple
jump was 23 m, which was comparable to the 2009 IAAF Berlin World Championships reports.
The performance distance consisted of three zones (9 m, 7 m, 8 m respectively). A 0.5 m
overlap occurred between zones 1 and 2 and between zones 2 and 3 (Figure 3). Each zone
was covered by two cameras (Figure 2). An additional camera was used to record the total
area in order to verify what happened during competition.

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201192/207

Temporal variables; hop, step and jump time; spatial variables; horizontal and verticalvelocity at landing and take-off; and hop, step and jump distances for each trial were
calculated.

Figure 2. Set-up of control frames & cameras

Figure 3. Three zones for recording triple jump performances

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201193/207

1. Kinematic variables of the top 8 athletes - 1
Jump distance (m)Stride length (m)Name / Attempt
Saladuha O. 1stth

Rypakova O. 5thIbarguen C. 5
Gay M. 5thst

Aldama Y. 1

stSavigne Y. 1
Kuropatkina A. 2ndrdRahouli B. 3

off.

real

loss

2L

1L

Hop

Step

Jump

14.94

15.04

0.10

2.25

2.21

5.73

4.15

5.16

14.89

15.14

0.25

2.48

2.71

5.38

4.23

5.53

14.84

14.89

0.05

2.20

2.14

5.48

4.19

5.22

14.67

14.92

0.25

2.39

2.11

5.55

4.33

5.04

14.50

14.62

0.12

2.21

2.10

5.62

4.49

4.51

14.43

14.59

0.16

2.19

2.09

5.18

3.82

5.59

14.23

14.23

0.00

2.10

2.28

5.03

4.18

5.02

14.12

14.26

0.14

2.24

2.05

4.95

4.23

5.08

Relative distance (%)

Horizontal velocity (m/s)

Name / Attempt
Hop

Step

Jump

2L

1L

Hop

Step

Jump

Saladuha O. 1

38

28

34

9.09

9.04

8.31

7.14

5.9

Rypakova O. 5th

35

28

37

9.44

9.45

8.51

7.79

6.99

37

28

35

9.72

9.47

8.64

7.91

6.22

37

29

34

8.88

8.95

7.73

6.98

5.85

38

31

31

8.94

8.99

7.92

6.4

5.43

36

26

38

9.16

9.20

8.24

8.18

7.00

35

30

35

8.70

8.72

7.60

7.17

6.11

35

30

35

8.81

8.9

8.15

7.47

6.45

st

th

Ibarguen C. 5
Gay M. 5thAldama Y. 1st
st

Savigne Y. 1
Kuropatkina A. 2

ndRahouli B. 3rd

Loss of horizontal velocity (m/s)

Vertical velocity (m/s)

Angle of take-off (°)〫

Hop

Step

Jump

Hop

Step

Jump

Hop

Step

Jump

st

0.73

1.17

1.24

2.22

1.62

2.29

15.1

12.8

21.2

Rypakova O. 5

th

0.94

0.72

0.8

2.03

1.51

2.13

13.4

11.0

17.1

Ibarguen C. 5

th

0.83

0.73

1.69

2.13

1.72

2.5

14.1

12.1

22.1

th

Name / Attempt
Saladuha O. 1

Gay M. 5

1.22

0.75

1.13

1.98

1.57

2.28

14.4

13.0

21.6

st

1.07

1.52

0.97

2.19

2.03

2.17

15.4

17.7

22.0

st

0.96

0.06

1.18

1.79

1.00

2.03

12.2

6.7

16.1

nd

1.12

0.43

1.06

1.78

1.62

2.30

13.1

12.7

20.7

rd

0.75

0.68

1.02

1.71

1.67

1.99

11.8

12.6

17.2

Aldama Y. 1

Savigne Y. 1
Kuropatkina A. 2

Rahouli B. 3

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201194/207

2. Kinematic variables of the top 8 athletes - 2
Name / Attempt

Duration of the support phase (s)Minimal knee angle (°)at contact phase

Hop

Step

Jump

Hop

Step

Jump

0.15

0.17

0.17

147

140

144

0.13

0.17

0.17

150

145

148

Ibarguen C. 5

0.13

0.15

0.18

143

156

142

Gay M. 5th

0.17

0.18

0.20

140

137

143

0.12

0.17

0.20

149

136

143

0.13

0.15

0.17

133

144

138

0.15

0.17

0.20

146

136

141

0.15

0.17

0.20

148

144

147

st

Saladuha O. 1

thRypakova O. 5

thAldama Y. 1stst

Savigne Y. 1

ndKuropatkina A. 2

rdRahouli B. 3

Inclination angle at touch-down (°)
Name / Attempt

Trunk angle (°)

Hop

Step

Jump

Hop
↓

Hop
↑

Step
↓

Step
↑

Jump
↓

Jump
↑

21

14

16

92

84

88

73

93

89

Rypakova O. 5

17

12

13

84

84

83

80

91

84

Ibarguen C. 5th

21

18

23

92

79

92

75

80

81

21

19

22

91

89

88

80

85

75

13

14

21

87

86

86

73

80

69

13

11

21

88

88

91

89

87

89

Kuropatkina A. 2

19

12

22

87

91

86

80

83

84

Rahouli B. 3rd

18

17

19

88

88

88

87

84

78

Saladuha O. 1stth

Gay M. 5thAldama Y. 1thst

Savigne Y. 1

ndName / Attempt
stSaladuha O. 1

thRypakova O. 5thIbarguen C. 5
Gay M. 5thAldama Y. 1

stSavigne Y. 1stnd

Kuropatkina A. 2

rdRahouli B. 3

Average velocity of the leadleg (°/s)

Landing

Hop

Step

Jump

dist.
(m)

knee angle(°)

hip angle(°)

trunk angle
(°)

561

540

401

0.40

124

77

77

603

487

479

0.48

129

85

62

662

528

596

0.43

145

69

46

496

498

400

0.58

154

71

40

523

477

418

0.52

154

75

52

552

478

511

0.47

123

89

93

449

482

432

0.48

138

78

50

514

474

427

0.47

156

67

71

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201195/207

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201196/207

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

97/207th

The triple jump event for female qualifiers began at 11:41 AM. on August 30 , 2011. The
temperature was 27° Celsius with a humidity of 70%. There were two groups of athletes, with
17 athletes in group A and 17 athletes in group B.
Athletes with a qualification distance of over 14.45 m and the top 12 ranked athletes
advanced to the next round. The 34 athletes had an average distance of 13.95 ± 0.39 m.
Only 3 of the athletes had a distance greater than this. The cut off line for advancement was
14.35 ± 0.14 m, which was only 0.40 m longer than the average distance. Yargeris SAVIGNE(CUB) was ranked first, Mabel GAY (CUB) was ranked second, and Caterine IBARGUEN(COL) was ranked third. These three athletes had an average distance of 17.23 ± 0.07 m,
which was 0.61 m longer than the qualification distance and 0.21 m longer than the average
distance of other qualifying athletes.
The finals of the women’s triple jump event began at 7:17 AM. on September 1st, 2011. The
temperature was 29° Celsius with a humidity of 53%.
The average distance for the female triple jump finalists at the 2011 Daegu World Championships
was 14.58 ± 0.31 m, while the top ranked Olha SALADUHA (UKR) jumped 0.36 m further than
the average of the top eight ranked athletes.
The hop, step and jump phases with the stride length relative distance were classified into
the hop-dominated technique, the balanced technique and the jump-dominated technique. The
number two ranked Olga RYPAKOVA (KAZ), sixth ranked Yargeris SAVIGNE (CUB), and seventhranked Anna KUROPATKINA (RUS) used the jump-dominated technique, while eighth ranked
Baya RAHOULI (ALG) used the balanced technique. Number one ranked Olha SALADUHA(UKR) and the remaining athletes used the hop-dominated technique.
The horizontal velocity at take-off for all of the phases for the top eight ranked athletes atthe 2011 Daegu World Championships averaged: L (9.09 ± 0.34 m/s), 1L (9.09 ± 0.26 m/s),
Hop (8.14 ± 0.37 m/s), Step (7.38 ± 0.58 m/s), and Jump (6.24 ± 0.55 m/s). The vertical velocity
at take-off averaged: Hop (1.98 ± 0.20 m/s), Step (1.59 ± 0.29 m/s), and Jump (2.21 ± 0.17 m/s).
The average take-off angle for the top eight ranked females at the 2011 Daegu World Championships
was: Hop (13.69 ± 1.30°), Step (12.33 ± 3.01°), and Jump (19.75 ± 2.50°) for each of the phases.
The support phase duration was: Hop (0.14 ± 0.02 s), Step (0.17 ± 0.01 s), and Jump (0.19 ± 0.02s).
3. Stick figures of the top 8 athletes
Rank 1 : Saladuha, O.; 1st Attempt; 14.94 m

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201198/207

Rank 2 : Rypakova, O.; 5th Attempt; 14.89 m

Rank 3 : Ibarguen, C.; 5th Attempt; 14.84 mthRank 4 : Gay, M.; 5 Attempt; 14.67 m

Rank 5 : Aldama, Y.; 1st Attempt; 14.50 m

Rank 6 : Savigne, Y.; 1st Attempt; 14.43 m

Rank 7 : Kuropatkina, A.; 2nd Attempt; 14.23 m

rdRank 8 : Rahouli, B.; 3Attempt; 14.12 m

Biomechanics Research Project Report in the IAAF World Championships, Daegu 201199/207

13th IAAF World Championships inAthletics, Daegu Final Report
Men's Shot Put Finals• Director :Cheong-Hwan Oh(Chungnam National University, Korea) · Eui-Su Shin(Chungnam National University, Korea)
Su-Nam Choi(Chungnam National University, Korea) · Ik-Su Jeong(Chungnam National University, Korea)
Jae-Hee Bae(Chungnam National University, Korea) · Jeong-Tae Lee(Korea Research Institute of Standards and Science, Korea) · Seung-Bum Park(Busan Economic Promotion Agency, Korea)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

100/20711. Biomechanical Analysis of Men’s Shot Put Finals
th

13

nd

IAAF World Championships in Athletics, Daegu on September 2 , 2011 at 18:56

The preliminary round for men’s shot put began at 09:56 on September 1st, 2011. The
weather was sunny, and the temperature was 27° C with a humidity of 74%. 27 athletes fromall over the world, were divided into two groups. Group A consisted of 14 athletes and group
B consisted of 13 athletes.
Only 12 athletes could move on to the finals. To qualify, competitors either had to throw thequalification distance of 20.60 m or place within the top 12. The average throw distance of the
27 athletes during the preliminary round was 19.92 ± 0.92 m, and only 7 threw further than
the qualification distance.
David STORL (GER) took 1st place in the preliminary round, Dylan ARMSTRONG (CAN)
took 2nd and Reese HOFFA (USA) took 3rd. The average throw distance of the three was
21.17 ± 0.29 m. This was 1.25 m longer than that of the other 24. The average throw
distance, speed, angle of projection and height of the three are as shown in <Figure 1>.

Figure 1. Selected kinematic data from the men's shot put qualifications
The final round for the men’s shot put began at 18:56 on September 2nd, 2011. The weather
was a little cloudy, and the temperature was 27°C with a humidity of 64%. The average throw
distance was 21.13 ± 0.50 m. This was 0.11 m shorter than that of the 2009 Berlin WorldChampionships, which was 21.24 ± 0.53 m. In terms of technique styles used by the top 8
athletes, the 1st and the 3rd place finishers used the glide technique, while the 5 other top

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101/207

finishers used the rotational technique. Similar to 2009 Berlin World Championships, more
athletes in Daegu used the rotational technique than the glide technique. In Berlin, 3 athletes
used the glide technique and 5 athletes used the rotational technique. Nevertheless, athletes
using the glide technique took 2 medals (gold and bronze) out of 3 at the 2011 Daegu WorldChampionships, and athletes using the glide technique also took the silver and bronze at the
Berlin Championships. In other words, many athletes used the rotational technique but theglide technique has proven to be a good way to achieve a long distance.
The gold medalist, David STORL (GER), set a personal record of 21.78 m outperforming his
season’s best of 21.05 m by 0.73 m (3.4%). The 2nd to 8th place finishers threw an average of-3.6% shorter their season’s best.
Table 1. Official competition results from the men’s shot put finals in relation to season’s best(SB) before the World Championships (WCh) and the technique style used
Rank

AthletaResult WCh (m)SB before WCh (m)

Style

1

David STORL (GER)

21.78

21.05

3.40%

glide

2

Dylan AMSTRONG (CAN)

21.64

22.12

-2.20%

rotational

3

AndreiMIKHNEVIKI (BLR)

21.4

22.1

-3.20%

glide

4

Christian CANTWELL
(USA)

21.36

21.87

-2.40%

rotational

5

Reese HOFFA (USA)

20.99

21.87

-4.10%

rotational

6

Marco FORTES (POR)

20.83

20.89

-0.30%

rotational

7

Ryan WHITING (USA)

20.75

21.76

-4.70%

rotational

8

Adam NELSON (USA)

20.29

22.09

-8.20%

rotational

The average throw speed at the men’s shot put quarterfinals at the 2011 Daegu WorldChampionships was 13.24 ± 0.38 m/s. It was 0.58 m/s slower than that of the Berlin
Championships which was 13.82 ± 0.24 m/s. The average angle of projection was 34.68 ± 2.90°.
This was 1.32° lower than that of the Berlin Championships which was 36.00 ± 2.77°.
The average throw height was 2.10 ± 2.91 m, which was lower than at the Berlin
Championships, which was 2.23 ± 0.15 m. The average angular velocity at the shoulder was
922.38 ± 61.07°/s, This, was faster than the speed at the Berlin Championships, which was
859.37 ± 126.35°/s. But the average angular velocity at the hip in Daegu was 479.50 ±Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

102/207101.81°/s, which was slower than the Berlin Championships (502.50 ± 110.58 °/s).
In terms of the throw height in relation to the types of technique, the average throw heightof athletes using the glide technique was 2.24 m, which was 0.19 m higher than that of theones using the rotational technique. In terms of the average shoulder and hip angular velocity,
the athletes using the rotational technique speeds of 953.2°/s and 520.8°/s respectively, which
was faster then the speeds of the athletes using the glide technique, who recorded speeds of
830.0°/s and, 355.5°/s respectively. Athletes using the rotational technique recorded shorter
times during delivery compared to the athletes using the glide technique.
Male fourth and fifth place finishers at the Berlin Championships, Reese Hoffa (1.80 m,
USA) and Adam Nelson (1.83 m, USA) are of relatively shorter height and used the rotational
technique. They had the lowest throw heights among the top 8 athletes. Their projection
angles were also fairly small: 32.9° and 34.4° respectively.
But their throw speed was relatively high: 14.0 m/s and 14.1 m/s respectively. Adam
Nelson’s (USA) shoulder angular speed was the highest among the top 8 athletes. Reese
Hoffa (1.80 m, USA) who placed 5th in the Daegu Championships had a small projection
angle of 31.16° and a low throw height of 2.02 m. However, his angular velocity at theshoulder was 997°/s, which was the highest among those who participated in theChampionships. His throw speed of 13.51 m/s was also high. These results demonstrate thathigh angular velocity in the upper body from the rotational technique can increase throwing
speed. Thus, relatively shorter shot putters can use this technique to achieve long distances
instead of attempting to increase throw height or projection angle.

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Table 2. Selected kinematic data of men’s shot put of finals

Rank

AthleteAnalysed attempt

Result WCh (m)Release velocity (m/s)

Release angle (deg)Release height (m)Angular velocity
shoulder ( /s)*

Angular velocity pelvis( /s)*

Duration time ofdelivery phase (sec)**

1

David STORL
(GER)

6

21.78

13.96

37.20

2.27

830

399

0.28

2

Dylan ARMSTRONG
(CAN)

4

21.64

13.03

37.47

2.11

965

640

0.15

3

Andrei MIKHNEVIKI
(BLR)

3

21.40

13.37

35.70

2.20

830

312

0.23

4

Christian CANTWELL
(USA)

5

21.36

12.94

35.96

2.06

952

545

0.17

5

Reese HOFFA
(USA)

2

20.99

13.51

31.16

2.02

997

484

0.17

6

Marco FORTES
(POL)

4

20.83

13.26

31.87

2.09

930

522

0.18

7

Ryan WHITING
(USA)

4

20.75

12.75

37.31

1.91

949

413

0.15

8

Adam NELSON
(USA)

1

20.29

13.14

30.79

2.10

926

521

0.15

21.13

13.25

34.68

2.10

922

479

0.18

mean

〬

〬

* Average between power position (touch down brace leg) and delivery position (release shot)** Delivery phase between rear foot touchdown and front foot touchdown

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*Glide phase**Delivery phase* Glide phase between initiation and rear foot touchdown** Delivery phase between rear foot touchdown and front foot touchdown
Figure 2. Glide technique style (Young, 2009)*Rotational phase**Delivery phase* Rotational phase between initiation and rear foot touchdown** Delivery phase between rear foot touchdown and front foot touchdown
Figure 3. Rotational technique style (Young, 2009)

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Figure 4. Release velocity

Figure 5. Release angle

Figure 6. Release height

Figure 7. Angular velocity shoulder

Figure 8. Angular velocity pelvis

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1st David STORL(GER)

2nd Dylan RMSTRONG(CAN)

3rd Andrei MIKHNEVIKI (BLR)

4th Christian CANTWELL (USA)

5th Reese HOFFA (USA)

6th Marco FORTES (POR)

7th Ryan WHITING (USA)8th Adam NELSON (USA)Figure 9. Center of mass velocity

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st

1 David STORL (GER)nd2

Dylan AMSTRONG (CAN)

3rd Andrei MIKHNEVIKI (BLR)
Figure 10. Trajectory of the shot

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1st David STORL (GER)

Figure 11. Duration time of delivery phase (0.28 s)

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2nd Dylan AMSTRONG (CAN)

Figure 12. Duration time of delivery phase (0.17 s)

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3rd Andrei MIKHNEVIKI (BLR)

Figure 13. Duration time of delivery phase (0.23 s)

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111/20713th IAAF World Championships inAthletics, Daegu Final Report
Women's Shot Put Finals• Head Researcher :Cheong-Hwan Oh(Chungnam National University, Korea) · Eui-Su Shin(Chungnam National
University, Korea) · Su-Nam Choi(Chungnam National University, Korea) · Ik-Su Jeong(Chungnam
National University, Korea) · Jae-Hee Bae(Chungnam National University, Korea) · Jeong-Tae
Lee(Korea Research Institute of Standards and Science) · Seung-Bum Park(Busan Economic
Promotion Agency)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011112/20712. Shot Put Women - Final
Table 1. Official competition results of the women’s shot put finals in relation to season’s best(SB) before the World Championships (WCh) and used technique style used

Rank

AthletaResult WCh (m)SB before WCh (m)

Style

1

Adams, V. (NZL)

21.24

20.78

2.21%

glide

2

Ostapchuk, N. (BLR)

20.05

20.94

-4.3%

glide

3

Camarena-Williams, J. (USA)

20.02

20.18

-0.8%

changing

4Gong, L. (CHN)

19.97

18.73

6.6%

glide

5

Kolodko, Y. (RUS)

19.78

19.33

2.3%

glide

6

Li, L. (CHN)

19.71

19.72

-0.06%

glide

7

Avdeeva, A. (RUS)

19.54

19.17

1.93%

glide

8

Kleinert, N. (GER)

19.26

19.22

0.20%

glide

The average throw distance of the women’s shot put at the 2011 Daegu Championships
was 19.94 m, which was 0.92 m longer than the 19.02 m qualifying distance for the finals.
The 19.94 m average distance in Daegu was higher than both the average distance at the2009 Berlin Championships (19.54 m) and that of the 2007 Osaka Championships (19.42 m).
In the finals, 5 athletes outperformed their season's best distances. Adams, V. (NZL) won theChampionships with this season's best distance, which also set a new IAAF record for
women’s shot put at the 2011 Daegu Championships in Athletics (Table 1).

Figure 1. Definition of factory

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Table 2. Selected kinematic data of women’s shot put of finals
Release height (m)shoulder (°/s)

21.24

13.75

33.49

2.21

888

621

2

Ostapchuk, N. (BLR)

5

20.05

13.14

39.18

2.09

863

442

3

Camarena-Williams, J. (USA)

4

20.02

13.26

33.95

1.95

988

587

4

Gong, L. (CHN)

5

19.97

13.06

35.17

1.90

883

445

5

Kolodko, Y. (RUS)

3

19.78

13.04

37.77

2.07

792

569

6

Li, L. (CHN)

2

19.71

12.91

35.68

2.03

812

505

7

Avdeeva, A. (RUS)

5

19.54

13.20

35.13

1.94

838

261

8

Kleinert, N. (GER)

1

19.26

12.70

34.45

1.93

789

555

19.94

13.13

35.60

2.01

876

523

mean

pelvis (°/s)*

Release angle (deg)6Angular velocity

Result WCh (m)Adams, V. (NZL)

Angular velocity

Analysed attempt1

Release velocity

Athlete

(m/s)

Rank

At the women’s shot put tournament, the average throw speed was 13.13 ± 0.30 m/s; theaverage angle of projection was 35.60 ± 1.94°; and the average throw height was 2.01 ± 0.10m.

The average angular velocity at the shoulder and pelvis from power zone until release

were 876 ± 65.53°/s, 523 ± 115.57°/s respectively. The average throw speed was slower thanthat of the Berlin Championships, which was 13.27 ± 0.21 m/s. Combined analyses from both
events revealed that men need a minimum of 13.5 m/s to throw 21 m while women need 13.0
m/s to throw 19 m. The scores from the men’s shot put finals at the Berlin Championships did
not show any correlation between throw speed and distance, but there was a strong
correlation between these two variables at the Berlin women’s shot put finals. This correlation
was r=0.9, p>.01. At the 2011 Daegu Championships in Athletics, the scores from thewomen’s shot put finals showed a high correlation between throw speed distance. This
correlation was r=0.88, p>.05 (Figure 3). As far as individual records were concerned, Adams(NZL) who scored 21.24 m had a speed of 13.75 m/s, while Ostapchuk (BLR) andCamarena-Williams (USA) who also scored over 20 m had speeds of over 13 m/s. Others
who also recorded distances of 19 m or more had speeds of 13.0 m/s or higher. Kleinert(GER), who won the silver at the Berlin Championships by scoring 20.20 m with a throw
speed of 13.5m/s, threw 19.26 m with 12.70 m/s at the 2011 Daegu Championships inAthletics. The results demonstrated an obvious correlation between throw speed and distance.

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Through analysis at the 2009 Berlin World Championships in Athletics and the 2011 Daegu
World Championships in Athletics, it was proven that faster throw speed has a positive
influence on the increase in throwing distance.
The optimal projection angle in shot put is considered to be 37°. The average projection
angle at the Daegu Championships was 35.60°, and the average throwing distance was 19.94
m. At the Berlin Championships the average projection angle was 36.9°, and the average
throwing distance was 19.54 m. Adams (NZL) threw 21.24 m using the glide technique andhad a projection angle of 33.49°. Camarena-Williams (USA) threw 20.02 m using therotational technique and had projection angle of 33.95°. In contrast Ostapchuk(BLR) threw

20.05 m using the glide technique and had a high projection angle of 39.18°. These results
show that the optimal projection angle did not have a large impact on throw distance, while
throw technique and physical characteristics could also influence the distance.
Out of the elements directly influencing the score, there was a big difference in throw
height depending on the athlete’s height and length of upper limbs. In Daegu, the tallest
female shot putter Adams (NZL) had a release height of 2.21 m. Ostapchuk (BLR), who

iscomparatively short, used the glide technique and released at a height of 2.09 m.
Camarena-Williams (USA), who is the same height as Ostapchuk (BLR), used the rotational
technique for a release height of 1.95 m. As far as throw height was concerned, there was no
significant difference between the top athletes and the others, as shown in <Table 2>.
However, Adams’ (USA) score was noteworthy. Among the athletes who made it to the finals,
she was the only one who used the rotational technique and had a low throw height and small
projection angle. In particular, her angular velocity at the shoulder, as well as throw speed, werehigh numbers compared to other competitors. It appears that Adams’ (USA) strategy was toutilize high angular velocity at the shoulder using the rotational technique to increase her throw
speed rather than attempting to increase throw height and projection angle. Her results support
the theory that the rotational technique is a better fit for competitors who have a shorter height.

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Figure 2. Correlation between throwing distance and kinematic data

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1st Valerie ADAMS (NZL)

2nd Nadzeya OSTPCHUK (BLR)

3rd J. CAMARENA-WILLIAMS (USA)

4th Lijiao GONG (CHN)

Figure 3. Trajectory of the shot putters

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Biomechanical Analysis of the Women's Shot put- Finals
13th

IAAF World Championships in Athletics - Daegu on

August 29th2011 at 20:36

ADAMS, V.(NZL)

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2011 IAAF World Championships,
Daegu KSSB Project Final Report(Javelin Throw - Men's - Finals)• Director :Woen-Sik Chae(Kyungpook National University, Korea) · Young-Tae Lim(Kunkuk University, Korea)• Researcher :Chang-Jin Yoon(Kyungpook National University, Korea) · Haeng-Seob Lee(Kyungpook National
University, Korea) · Jong-Woo Kim(Kyungpook National University, Korea) · Dong-Soo
Kim(Kyungpook National University, Korea) · Jung-Ho Park(Kyungpook National University, Korea)· Gun-Su Kim(Kyungpook National University, Korea) · Chang-Eun Kim(Kyungpook National
University, Korea) · Sung-Jung Kim(Kunkuk University, Korea)

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119/20713. Biomechanical Analysis of the Javelin Throw - Men’s Finals
At the 2011 IAAF World Championships, Daegu, men’s javelin throw event, M. de Zordo
from Germany won the gold medal with a distance of 86.27 m. It was an unexpected win
since A. Thorkildsen from Norway was favored to win, but M. de Zordo’s first attempt set therecord for the season’s best throw (Figure 1).

Figure 1. M. de Zordo (GER)
Before starting the analyses, three high speed digital cameras (Casio EX-F1 Exilim, JPN,
300 frames/ sec, shutter speed 1/1000 second) were installed 45° above the athlete tocapture each movement more precisely (Figure 2). The DLT (direct linear transformation)
algorithm was used to calculate 3-D coordinate values. Four critical events and three phases
were used for analysis (Figure 3). Temporal parameters, velocity variables, release conditions,
inclination angle of body segments, and distance variables were determined for each trial.

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Figure 2. Camera locations

Events․ LC : Left Foot of Cross step
․ RC : Right Foot Contact․ LD : Left Foot in Delivery․ RE : Release
Phases․ CP : Crossover Stride Phase․ DP : Delivery Phase․ RP : Release Phase
Figure 3. Events & Phases

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The men’s final competition results were as follows: average release angle 34.6 ± 2.2°,
average attitude angle 37.4 ± 3.5°, and average attack angle 3.2 ± 2.4°. At the release, theaverage inclination angle of the body segments were as follows: trunk angle 54.2 ± 7.6°,
upperarm angle 48.3 ± 9.1°, and forearm angle 51.1 ± 8.7°. Moreover, the average releasevelocity and the average release height results were 27.90 ± 1.04 m/s, 1.99 ± 0.07 m
respectively. The average release angle at the 2009 Berlin World Championships ('09 WC)
was slightly lower (on average 2.1°), compared with the average release angle at thesechampionships ('11 WC). It is common knowledge that in the javelin throw, the optimal release
angle is 34-36°. However, positive outcomes are still possible with angles that are lower than
34° or higher than 40°. This is possible because the optimal angle can change based on aslight difference in the throwing method and/or a change in flight trajectory.
The release angles for gold medalist M. de Zordo, silver medalist A. Thorkildsen, andbronze medalist G. Martinez were 37.3°, 35.9° and 36.7° respectively. Surprisingly, there wasa similarity between the gold medalist for these championships ('11 WC) and the gold medalist
for the Berlin World Championships ('09 WC), as both athletes’ release angles were around
37.6°. A. Thorkildsen who was the gold medalist for the 2009 Berlin World Championships ('09WC), under performed this year when he scored 4 m less than his winning performance inBerlin of 89.59 m, hence, earning a silver medal. When comparing the two competitions, his
release angle in 2011 also decreased by 1.7°. However his attack angle, which is thedifference between the release angle and attitude angle, increased by 3°. Therefore, it can beconcluded that the reason he was not able to win this championship was his low release
angle and high attack angle. When comparing the finalists’ release angles with those of otherathletes, it can be seen that the finalists had higher release angles. Hence, as the throwing
distance and the throwing angle are positively correlated, it is important for athletes to find theappropriate release angle in order to achieve the longest throwing distance.

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Table 1. Kinematic data of men’s javelin throw finals

Release(GER)

Delivery
strideMark FRANK

Impulsestride(AUS)

Foul line

Jarrod BANNISTER

Delivery
stride(UKR)

ImpulsestrideRoman Avramenko

Fore arm(TUR)

Upper arm

Fatih Avan

Trunk

(CZE)

Attack8Vitezslav Vesely

Release7(CUB)

Attitude

6

Guillermo Martinez

CM Velocity at
release (m/s)

5

(NOR)

Release height(m)4

Andreas Thorkildsen

Release velocity
(m/s)

3

(GER)

Result (m)2Matthias de Zordo

Analysed

1

Athleteattempt

Rank

1

86.27

29.90

2.01

0.86

40.3

37.3

3.0

44.4

45.2

46.0

1.96

1.71

1.40

366

253

140

4

84.78

28.62

1.93

0.96

39.2

35.9

3.3

50.7

40.1

57.6

2.39

1.89

1.84

400

170

107

1

84.30

28.33

2.07

0.95

35.7

36.7

1.8

53.4

32.9

44.5

2.51

1.99

1.45

443

243

124

3

84.11

26.79

1.92

0.81

39.9

34.6

5.3

67.3

54.3

40.4

1.92

1.83

0.85

320

180

120

2

83.34

27.44

1.97

0.91

35.2

31.5

3.7

54.1

54.7

58.5

2.06

1.66

1.07

323

197

163

1

82.51

27.93

1.91

0.73

41.5

34.2

7.3

63.3

45.0

42.5

2.53

1.58

0.65

374

183

137

1

82.25

27.11

2.05

0.75

31.2

31.5

0.3

52.6

53.9

55.7

2.39

1.61

0.37

427

193

143

2

81.81

27.04

2.08

0.69

35.8

35.2

0.6

48.1

60.5

63.4

2.13

1.87

1.88

374

213

143

83.67

27.90

1.99

0.83

37.4

34.6

3.2

54.2

48.3

51.1

2.24

1.77

1.19

378

204

135

72.03

27.60

1.76

0.70

42.0

42.3

0.3

43.9

52.0

54.4

1.96

1.6

2.61

410

180

130

mean
Sang-Jin, Jung
(KOR)

1

Angle at release(deg)

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Inclination angle(deg)Distance(m)

Duration(ms)

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In the javelin throw, the most important factor is the release velocity. Gold medalist M. de
Zordo had a release velocity of 29.90 m/s, the highest velocity of all athletes. He achieved aslightly higher velocity than A. Thorkildsen, who was the 2009 Berlin Competition gold
medalist. At the 2009 Berlin Competition, A. Thorkilden recorded a distance of 89.59 m, witha release velocity of 29.30 m/s. The biggest difference between both athletes is in their attack
angles. The attack angle is the difference between the release angle and the attitude angle.
A. Thorkildsen’s attack angle was 0.3°. However, the gold medalist M. de Zordo had an attack
angle that was 10 times higher, 3.0°. Perhaps, if M. de Zordo had had a smaller attack angle,
it is possible he could have achieved a greater distance. From analyses of both the 2009
Berlin World Championships and the 2011 Daegu World Championships demonstrate that
faster release velocity, a release angle close to 37° while taking outside influences into
account, and minimizing the attack angle are the best ways to achieve the maximum throwing
distance, especially if all three are synchronized.
The research team analyzed the duration of the finalists’ three phases (CP, DP, and RP).
The average times for CP, DP, and RP were 0.378 ± 0.044 sec, 0.204 ± 0.030 sec, 0.135 ±0.017 sec, consecutively. When analyzing each section individually, the distance it took for CP
averaged 2.24 ± 0.25 m, for DP it was 1.77 ± 0.15 m, and the distance to the foul line was
1.19 ± 0.55 m. At the 2009 Berlin Competition, all the medalists had one thing in common,
which was that the CP took longer and had a longer length than the DP.
The reasons why the CP was longer is because it maximizes the use of the lower bodywhile it is in movement. Also, the athlete’s throwing direction and the back slope are in
opposite directions, therefore biomechanically it has a huge influence in increasing strengthand distance. Thus, when strength (F) and time (t) are combined it increases the crossover
stride.
In the delivery stride, it is important for an athlete to put his/her feet forward, then step
forward and also to secure enough space in the base side so there are no disturbances when
the athlete maximizes his/her strength. The athlete’s hip and shoulders should be facing
opposite the throwing direction and should rotate, hence increasing the strength which willlead to a longer distance. Therefore, when looking at the differences between medalists andother finalists, medalists had an average CP of 2.29 m while the other finalists had a slightly
lower average of 2.21 m. In DP, the medalists achieved a distance of 1.86 m while the otherfinalists had a distance of 1.71 m. In particular, the bronze medalist G. Martinez had a stride
distance of 2.51 m in CP and a distance of 1.99 m in DP. However, even with a longcrossover stride and long delivery stride, his angle of attitude and angle of release were too
low, preventing him from throwing further.
At the point of release, the CM velocity of the body of the medalists was an average ofBiomechanics Research Project Report in the IAAF World Championships, Daegu 2011

124/2070.92±0.06 m/s, while the other finalists were at 0.78 ± 0.09 m/s. From the results, it can beconcluded that these medalists had a faster velocity than other finalists.

Figure 4. Sang-Jin Jung (KOR)
The Korean athlete Sang-Jin Jung’s throwing results were as follows: release velocity of
27.60 m/s, angle of release 42.3°, and release height 1.76 m. In addition, the inclination angleof the body segments at release were as follows: trunk angle 43.9°, upper arm angle 52.0°,
and forearm angle 54.4°. The speed of CP was 4.78 m/s and the DP was 8.89 m/s. The
attack angle was 0.3°, which means the release should have been very effective. However,
his attitude angle and release angle were slightly too high. This can happen when the upper
body is more bent or curved at release than that of other athletes. In order for the Korean
athlete to increase his distance he needs to increase his velocity of release. What this meansis that at the time of release he should increase the CM velocity of his body while
simultaneously increasing the release velocity by increasing the rotation speed of his hip andalso maximizing the rotation speed of his upper arm. Moreover, he should align his bodyangle in the throwing direction while leaning forward slightly. Compared to other athletes, hisfinal steps were considerably short of the foul line. In this competition, he had a difference of
1.42 m, which ultimately meant that he lost 1.42 m in the overall distance. Additionally,
compared to other athletes, he had a shorter movement distance in the crossover stride.
However, as he took longer than other athletes, it can be concluded that he was noteffectively transiting the CM velocity of his body to the javelin, which negatively influenced histhrows. When cross stepping up to the moment of release, the appropriate step distance anda continuous rhythmical take off movement is necessary.

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Figure 5. M. DE ZORDO (GER)

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Figure 6. A. THORKILDSEN (NOR)

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Figure 7. G. MART'INEZ (CUB)

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2011 IAAF World Championships,
Daegu KSSB Project Final Report(Javelin Throw - Women's Finals)• Director :Woen-Sik Chae(Kyungpook National University, Korea) · Young-Tae Lim(Kunkuk University, Korea)• Researcher :Chang-Jin Yoon(Kyungpook National University, Korea) · Haeng-Seob Lee(Kyungpook National
University, Korea) · Jong-Woo Kim(Kyungpook National University, Korea) · Dong-Soo
Kim(Kyungpook National University, Korea) · Jung-Ho Park(Kyungpook National University, Korea)· Gun-Su Kim(Kyungpook National University, Korea) · Chang-Eun Kim(Kyungpook National
University, Korea) · Sung-Jung Kim(Kunkuk University, Korea)

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The 2011 IAAF World Championships, Daegu, women’s javelin throw came to a surprising
end as the competitors kept overtaking the previous records. Russian javelin thrower, M.
Abakumova (RUS), was finally able to win the gold medal after a long, agonizing streak ofcoming in second (Figure 1).

Figure 1. M. Abakumova (RUS)
Before starting the analyses, control objects (4 m x 9 m x 4 m) had to be set up in order
to find a control point. The control point took the movement of javelin throwers into account.
Three high speed digital cameras (Casio EX-F1 Exilim, JPN, 300 frames/ sec, shutter speed
1/1000 second) were installed 45° above the athlete to capture each movement more precisely(Figure 2). The DLT(direct linear transformation) algorithm was used to calculate 3-D coordinate
values. Four critical events and three phases were used for analysis. Temporal parameters,
velocity variables, release conditions, the inclination angle of body segments, and distancevariables were determined for each trial (Figure 3).

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Figure 2. Camera locations

Figure 3. Variables
The women’s final event analytical results were as follows: average angle of release 38.0 ±
2.0°, angle of attitude 40.4 ± 4.3°, and angle of attack 3.7 ± 1.1°. At the release, the average
inclination angle of the body segments were as follows: angle of the trunk 60.8 ± 8.3°, angleof the upper arm 47.3 ± 10.1°, and angle of the forearm 62.6 ± 10.6°. Moreover, the releasevelocity and the release height results averaged 25.60 ± 1.16 m/s and 1.86 ± 0.05 m,
respectively. Additionally, three phases, the crossover phase (CP), delivery phase (DP), andrelease phase (RP), had an average durations of 0.350±0.066 sec, 0.198±0.039 sec, andBiomechanics Research Project Report in the IAAF World Championships, Daegu 2011131/2070.138 ± 0.013 sec. The CP and DP had average distances of 1.88 ± 0.31 m and 1.53 ± 0.21m accordingly, while after release, the distance difference between the landing foot and thefoul line averaged 1.72 ± 0.63 m.
Gold medalist M. Abakumova achieved the season’s best throw when she beat her 2009season’s best throw from the qualifying rounds of the Berlin Competition by 3.07 m. The
defending champion, and second place finisher, B. Spotakova (CZE), who had not been
performing well recently, also improved from her previous Berlin Competition score by 5.16 m,
making it her personal best throw for the whole season. However, she was not able to beather all-time personal best throw and World Record of 72.28 m. South African third placefinisher S. Viljoen (RSA) did not qualify for the finals at the Berlin Competition. However, she
was able to achieve her season’s best throw and set the record for furthest throw by an
African. Every athlete, excluding the top three winners, underperformed by an average of 2.52
m compared to their season’s best throws. In particular, C. Obergfoll (GER) underperformed
with a fourth place finish 3.14 m behind the bronze medalist. She also fell short of her throwat the Berlin Competition by 5.57 m. During the qualifying records C. Obergfoll’s first and only
throw was her best throw of the season. And during both the qualifying and final rounds she
consistently threw further than third place finisher S. Viljoen (RSA). However, Viljoen shot
ahead of Obergfoll with her second to last throw of 68.38 m, and Obergfoll took fourth placewith a throw of 65.24 m.

Figure 4. The Medalists

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011132/207

Table 1. Kinematic data of women’s javelin throw finals(CZE)

Release

Jarmila KLIMESOVA

Delivery
stride(SLO)

ImpulsestrideMartina RATEJ

Foul line(AUS)

Delivery
strideKimberley MICKLE

Impulsestride(GER)

Fore arm

Kathrina MOLITOR

Upper arm

(GER)

Trunk

8

Christina OBERGFOLL

Attack7(RSA)

Release6

Sunette VILJOEN

Attitude5(CZE)

CM Velocity at
release (m/s)

4

Barbora SPOTAKOVA

Release height
(m)

3

(RUS)

Release velocity
(m/s)

2

Maria ABAKUMOVA

Result (m)1AthleteAnalysed attempt

Rank

5

71.99

25.11

1.85

0.85

43.8

39.4

4.4

61.2

43.7

47.6

1.87

1.74

2.36

313

194

140

5

71.58

26.27

1.96

0.87

42.2

38.2

4.0

52.8

47.5

67.8

1.61

1.60

2.54

313

190

147

5

68.38

24.42

1.84

0.80

43.0

39.3

3.7

46.7

62.8

68.6

1.59

1.41

1.66

310

167

113

4

65.24

26.48

1.88

0.80

35.2

33.2

2.0

65.1

29.6

62.7

2.10

1.66

1.20

370

173

143

6

64.32

26.09

1.78

0.63

41.3

38.8

2.5

58.8

47.1

51.8

1.91

1.51

0.57

433

203

154

5

61.96

25.10

1.83

0.66

43.9

38.9

5.0

62.5

40.6

80.6

1.81

1.74

1.91

350

203

130

5

61.65

27.49

1.87

0.69

32.3

37.3

5.0

73.5

56.8

65.9

2.51

1.51

1.64

450

164

133

1

59.27

24.96

1.86

0.67

41.7

38.6

3.1

66.0

50.5

56.0

1.66

1.10

1.85

257

287

143

65.55

25.60

1.86

0.75

40.4

38.0

3.7

60.8

47.3

62.6

1.88

1.53

1.72

350

198

138

54.96

21.20

1.62

0.63

44.7

43.2

1.5

43.9

60.3

67.3

1.46

1.60

1.62

312

258

147

mean
Kyung-Ae Kim
(KOR)

3

Angle at release(deg)

Biomechanics Research Project Report in the IAAF World Championships, Daegu 2011

Inclination angle(deg)Distance(m)

Duration(ms)

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Looking at the kinematic variables of the top three finalists for the women’s javelin throw atthe 2011 IAAF World Championships, Daegu, reveals that gold medalist M. Abakumova’s
release velocity was lower than her velocity at the Berlin Competition by 0.01 m/s.
Nonetheless, she was still able to throw the javelin 5.93 m further. Even though the travel
distance of the javelin is highly correlated to the release velocity, she was able to achieve ahigher distance with lower velocity. This is because the angle of release and release height(103.4 %/height) led to a positive outcome.
Out of all of the medalists, M. Abakumova had the highest vertical body angle at release.
When release occurs closest to a vertical body angle, the javelin can travel more smoothly.
Moreover, she had the fastest delivery velocity, called the power stride. A power stride ispossible when the delivery stride secures a wide base, efficiently sending power from theground to the javelin. Most of all, even though her angle of release decreased by 3.2°
compared to the Berlin Competition, with the right combination of javelin balance andmovement direction, she was able to effectively release the javelin, enabling her to secure thegold medal.
The number one ranked thrower in the world, B. Spotakova missed the gold medal by just
0.41 m. In terms of kinematic analysis, it can be concluded that she had a more favorable
position by achieving a release velocity of 26.17 m/s and an angle of attack of 4.0°.
However, the distance between her landing foot and the foul line was 2.54 m, 1.06 m morethan the other athletes. Furthermore, compared to the gold medalist, her CP and DP phasespeeds were 2.56 m/s and 0.19 m/s lower respectively. In order for her to win the gold medal,
she would need to improve her step distance, maintaining a continuous rhythmical run-up, andtaking her steps into account from cross step until the moment of release. Additionally, shewould need to work on her release position so that the distance between the foul line and herlanding foot decreases.
S. Viljoen, who won bronze, achieved the lowest score for release velocity compared to theother competitors, which has the most direct influence on distance in the javelin throw. She
had a body angle of 46.7° which was too low for the throw to be at top efficiency. Moreover,her CM velocity was the slowest out of the three medalists: this had a negative effect on therelease velocity. This type of outcome shows that if the CM velocity of the body is too slow,
it will cause a negative effect on the horizontal flight distance.
Comparing the kinematic parameters of the female medalists to those of male athletes atthe 2011 IAAF World Championships, Daegu, reveals that the women had a higher averageangle of release and angle of attitude. Gold medalist M. Abakumova, silver medalist B.
Spotakova, and bronze medalist S. Viljoen achieved angles of 39.4°, 38.2°, and 39.3°,
respectively. It can be seen that all the medalists had an angle of release close to 40°.

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In the 2009 Berlin Competition, the best throw was 68.92 m, set by M. Abakumova in thequalification round. In the finals, B. Spotakova won the silver medal. Both athletes exceeded
the male athletes with angles of release of 38.7°, and 38.8°. This can be interpreted to showthat even a slight difference in the weight of the javelin or in the release velocity can change
the outcome. This study, demonstrated that a medalist’s average angle of release was 39.0 ±
0.7°, while the other athletes got 37.4 ± 2.4°. Both top male and female athletes attained
higher angles of release compared to other finalists.

Figure 3. Kyung-Ae Kim (KOR)
The Korean athlete’s results were as follows: release velocity of 21.20 m/s, angle of releaseof 47.2°, and release height of 1.68 m. Moreover, the inclination angle of the body segments
were as follows: angle of the trunk 43.9°, angle of the upper arm 60.3°, and angle of theforearm 67.3°. Each phase movement speed for crossover was 5.12 m/s and the delivery was
5.65 m/s. A small difference in the release velocity, even as small as 1 m/s, can make adifference of 2.25 m to 3.68 m. In order to improve the Korean athlete’s javelin performance,
the athlete should improve her CM velocity when throwing the javelin. Increasing the hip joint
and trunk rotation velocity can also increase release velocity.
In addition, at release, the upper body should not be transversely stiff, but slightly rotating
so that the delivery motion can be smoother. However, if movement distance and duration are
too short, then the momentum of the center of mass will decline. Conversely if release
duration is too long, then initial velocity of the javelin will significantly decrease, just like in thecase of the Korean athlete. However, if the release duration is too long, then the velocity of
the javelin will decline. For that reason, the Korean athlete will need to change her landingstyle by controlling the landing distance from her foot to the foul line and her velocity. It ishighly recommended that she decrease the time it takes for her to land on her foot and thetime it takes for the javelin to leave her hand.

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Figure 4. M. ABAKUMOVA (RUS)

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Figure 5. B. SPOTAKOVA (CZE)

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Figure 6. S. VILJOEN (RSA)

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27 August - 3 September 2011

Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
Daily ReportContents
Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011

August 27, 2011
• 100 M Men-Round 1 : Heat 6• 100 M Men-Round 1• Long Jump Women - Qualification Group B• Pole Vault - Men Qualification Group A & B

August 28, 2011
• Yohan Blake, JAM - 100 M Men's Final• 100 M Men - Final• Shot Put Women - Qualification• Long Jump Women - Final

August 29, 2011
• Carmelita JETTER, USA - 100 M Women's Final• 100 M Women -Final• Shot Put Women - Final• Pole Vault Men - Final• Usain Bolt, JAM - 100 M Men's Semi Final

August 30, 2011
• High Jump Men - Qualification• Pole Vault Women - Final• Women's Pole Vault• Triple Jump Women - Qualification (Mabel Gay)

September 1, 2011
• High Jump Men - Final• Shot Put men - Qualification (Group A & Group B)• Triple Jump Women - Final

September 2, 2011
• 100 M Hurdle Women - Round 1• 200 M Men - Semi Final• 200 M Women - Final• Javelin Throw Women - Final• Long Jump Men - Final• Shot Pun Men - Final• Triple Jump Men - Final

September, 2011
• 200 M Women - Final• 200 M Men - Final• High Jump Women - Final• Javelin Throw Men - Final

Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
- August 27, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
100 M Men - Round 1 : Heat 6(August 27, 2011)

Biomechanical Analysis of Men’s 100 meter(Round 1 : Heat 6)
Rank

Name

Parameter

1

Usain
BOLT (JAM)

Total Steps:
40

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.20

3.83

5.30

6.80

8.29

9.03

10.10

Avg. Speed (m/s)

5.92

10.39

11.59

11.36

11.41

11.38

9.84

Avg. Step L (m)

2.24

2.83

2.71

Avg. Step Freq.

3.96

4.02

3.86

Rank

Name

Parameter

2

Dwain
CHAMBERS(GBR)

Total Steps:
44-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.28

3.93

5.43

6.96

8.49

9.24

10.28

Avg. Speed (m/s)

5.71

10.30

11.33

11.06

11.16

11.28

10.10

Avg. Step L (m)

2.04

2.43

2.71

Avg. Step Freq.

4.24

4.58

3.90

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Rank

Name

Parameter

3Angel DavidRODRIGUEZ(ESP)

Total Steps:
47

Rank

Name

4

Simon
MAGAKWE
(RSA)

Total Steps:
50

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.24

3.93

5.45

7.02

8.56

9.32

10.37

Avg. Speed (m/s)

5.79

10.08

11.21

10.81

11.06

11.09

10.03

Avg. Step L (m)

1.96

2.27

2.38

Avg. Step Freq.

4.41

4.82

4.41

Parameter

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.29

4.01

5.58

7.17

8.73

9.50

10.53

Avg. Speed (m/s)

5.67

9.90

10.81

10.74

10.90

10.94

10.23

1.74

2.13

2.71

Avg. Step Freq.

4.84

5.09

3.88

Name

Parameter

5

NilsonANDRE (BRA)

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.34

4.09

5.64

7.21

8.74

9.51

10.54

Avg. Speed (m/s)

5.55

9.75

10.94

10.81

11.14

10.99

10.23

-89.5 m -100 m

Avg. Step L (m)

1.68

2.13

2.11

Avg. Step Freq.

4.96

5.16

5.00

Rank

Name

Parameter

6

GeraldPHIRI (ZAM)

Total Steps:
47-89.5 m -100 m

Avg. Step L (m)Rank

Total Steps:
53-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.32

4.03

5.58

7.18

8.74

9.54

10.60

Avg. Speed (m/s)

5.60

9.98

10.94

10.60

10.90

10.63

9.94

Avg. Step L (m)

1.88

2.27

2.71

Avg. Step Freq.

4.48

4.74

3.77

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Rank

Name

Parameter

7

Abdouraim
HAROUN(CHA)

Total Steps:
46

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.29

4.02

5.60

7.23

8.86

9.65

10.72

Avg. Speed (m/s)

5.67

9.83

10.76

10.43

10.47

10.71

9.81

Avg. Step L (m)

1.96

2.43

2.38

Avg. Step Freq.

4.28

4.30

4.29

Rank

Name

Parameter

8

Moudjib
TOYB (COM)

Total Steps:
48-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.39

4.17

5.79

7.48

9.16

10.00

11.12

Avg. Speed (m/s)

5.45

9.55

10.49

10.06

10.12

10.04

9.40

Avg. Step L (m)

1.88

2.27

2.38

Avg. Step Freq.

4.32

4.45

4.07

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
100 M Men - Round 1
Long Jump Women - Qualification Group B
Pole Vault - Men Qualification Groups A & B(August 27, 2011)

Biomechanical Analysis of Men’s 100 meter(Round 1)
10 m

20 m

30 m

40 m

50 m

60 m

70 m

80 m

90 m

100 m

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

Avg.

/Avg.

Avg.

Avg.

speed

speed

speed

speed

speed

speed

speed

speed

speed

speed

(m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec)Max

Distance Total

speed

at MaxTime(m/sec)

Speed

(sec)

Usain
Bolt

5.30

9.63

10.78

11.31

11.59

11.64

11.59

11.38

10.94

10.12

11.64

55.27 10.10

5.17

9.48

10.59

11.15

11.35

11.40

11.32

11.11

10.74

10.31

11.42

50.61 10.26

5.33

9.57

10.69

11.12

11.25

11.29

11.21

11.00

10.66

10.17

11.31

54.55 10.26(JAM)
MichaelFarter(JAM)
NesterCarter(JAM)

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Biomechanical Analysis of Women’s Long Jump Qualification(Group B)
Maurren Higa MAGGI(BRA)

N. Mironchyk – IVANOVA
(BLR)

6.86

6.80

3Last (m)

2.34

1.95

2Last (m)

2.42

2.05

1Last (m)

2.25

2.17

Relative Length 2Last/3Last (%)

103.4

105.1

Relative Length 1Last/2Last (%)

92.9

105.9

Horizontal Vel. at Touch Down (m/s)

8.94

8.25

Horizontal Vel. at Take-off (m/s)

8.24

7.91

Loss of Horizontal
Vel. During Ground Contact (m/s)

0.70

0.34

Resultant Velocity at Take-off (m/s)

8.52

8.17

Record (m)Stride Length
Velocity

IAAF World Championships Daegu 2011

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Biomechanical Analysis of Men’s Pole Vault - Qualification(Groups A&B)
NAME

COUNTRY

Seasonal Best (m)Record (m)VA* (m/s)

AP# (m)Romail MESNIL

FRA

5.73

5.65

9.47

4.75

Dmitry STARODUBTSEV

RUS

5.75

5.65

8.65

4.57

Fabio Gomes DA SILVA

BRA

5.80

5.65

9.88

5.68

Mateusz DIDENKOW

POL

5.75

5.65

8.47

4.57

Malte MOHR

GER

5.81

5.65

9.15

4.88

Konstandinos FILIPPIDIS

GRE

5.73

5.65

9.46

3.95

Renaud LAVILLENIE

FRA

5.90

5.65

9.01

4.80

La´zaro BORGES

CUB

5.75

5.65

9.67

4.92

* VA : 5 m Run-up velocity before takeoff#

AP : Take-off Position at the heel from the cut in box

IAAF World Championships Daegu 2011

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Pole Vaulter

Romail MENSIL (FRA)

Record5.65 mRun-up distance

30.15 mRun-up time

5.12 sec

Average speed of run-up phase5.89 m/s(Run-up distance / Run-up time)

Number of run-up steps

18 steps

Average step length

1.68 m(Run-up distance / Number of run-up steps)

Step frequency

3.52 steps/sec(Number of run-up steps / Run-up time)

AP(Take-off position from the cut in box)

4.75 mPosition of CG*Details attached

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Scientific Research Project Biomechanical Analyses
at theIAAF World Championships Daegu 2011
- August 28, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Yohan Blake, JAM - 100 M men's Final(August 28, 2011)

Biomechanical Analysis of Men’s 100 meter
20m
30m
40m
50m
60m
70m
80m
90m 100m Max Distance Total
RANK 10m
Avg.
Avg.
Avg.
Avg.
Avg.
Avg.
Avg.
/Avg.
Avg.
Avg. speed at Max Time/LANE speed speed speed speed speed speed speed speed speed speed (m/sec) Speed (sec)(m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec)
Yohan
Blake
(JAM)
-Final

1/6

5.35

9.76

10.84 11.32 11.62 11.74

11.71 11.63 11.49 11.29 11.75

IAAF World Championships Daegu 2011

57.9

9.92

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
100 M Men - Final
Shot Put Women - Qualification
Long Jump Women - Final(August 28, 2011)

Biomechanical Analysis of Men’s 100 meter(Final)Rank /Lane

Name

Parameter

1/
6

Yohan BLAKE(JAM)
Total Steps:
47

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.21

3.84

5.33

6.78

8.24

8.98

9.92

Avg. Speed (m/s)

5.87

10.47

11.41

11.70

11.64

11.49

11.17

Avg. Step L (m)

1.88

2.43

2.38

Avg. Step Freq.

4.69

4.88

4.65

Rank /Lane

Name

Parameter

2/4Walter DIX(USA)
Total Steps:
48-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.26

3.92

5.44

6.91

8.39

9.14

10.08

Avg. Speed (m/s)

5.74

10.24

11.23

11.54

11.51

11.33

11.13

Avg. Step L (m)

1.81

2.27

2.38

Avg. Step Freq.

4.78

5.18

4.58

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Rank /Lane

Name

Parameter

3/
3

Kim COLLINSSKN (SKN)

Total Steps:
49

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.19

3.82

5.33

6.83

8.34

9.11

10.09

Avg. Speed (m/s)

5.93

10.45

11.28

11.33

11.26

11.00

10.71

Avg. Step L (m)

1.81

2.27

2.38

Avg. Step Freq.

4.88

5.03

4.49

Rank /Lane

Name

Parameter

4/8

Christophe
LEMAITRE(FRA)

Total Steps:
41

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.28

3.94

5.46

6.94

8.44

9.21

10.19

Avg. Speed (m/s)

5.69

10.26

11.16

11.49

11.33

11.08

10.71

2.14

2.62

3.17

Avg. Step Freq.

4.03

4.38

3.40

Name

Parameter

5/2Daniel BAILEY(ANT)

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.27

3.95

5.46

6.97

8.47

9.23

10.26

Avg. Speed (m/s)

5.73

10.20

11.06

11.36

11.16

10.80

10.68

-89.5 m -100 m

Avg. Step L (m)

1.88

2.27

2.38

Avg. Step Freq.

4.58

4.99

4.47

Rank /Lane

Name

Parameter

6/
1

Jimmy
VICAUT (FRA)

Total Steps:
46-89.5 m -100 m

Avg. Step L (m)Rank /
Lane

Total Steps:
48-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.24

3.90

5.44

6.94

8.48

9.27

10.27

Avg. Speed (m/s)

5.81

10.20

11.04

11.36

11.06

10.72

10.50

Avg. Step L (m)

1.96

2.27

2.71

Avg. Step Freq.

4.42

4.96

3.86

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Rank /Lane

Name

Parameter

7/
7

Yohan BLAKE(JAM)

Total Steps:
47

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.24

3.98

5.61

7.21

8.85

9.72

10.95

Avg. Speed (m/s)

5.80

9.77

10.43

10.63

10.38

9.77

8.54

Avg. Step L (m)

1.96

2.27

2.38

Avg. Step Freq.

4.28

4.67

3.76

Rank /Lane

Name

Parameter

8/5Usain BOLT(JAM)

Lap time (sec)0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

DQ

Avg. Speed (m/s)
Total Steps:
0

Avg. Step L (m)Avg. Step Freq.

IAAF World Championships Daegu 2011

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Biomechanical Analysis of Women’s Shot put(Qualification)

Ranking

COUNTRYRESULT

Inclination Angle atRelease (deg.)

ReleaseAngle(deg.)

Release
Velocity(m/s)

ReleaseHeight(m)

Forearm

Upperarm

Style

1

Valerie
ADAMS

NZL

19.79 m

38.8

12.78

2.07

40.7

43.2

Glide

2

GONG
LijiaoCHN

19.21 m

40.9

12.52

2.03

39.2

44.5

Glide

3

Christina
SCHWANITZ

GER

19.20 m

38.9

12.53

2.04

39.3

38.5

Glide

LEE
Mi-Young

KOR

16.18 m

33.4

11.23

2.01

41.4

53.9

Glide

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IAAF World Championships Daegu 2011

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Biomechanical Analysis of Women’s Long Jump - Final

Stride Length
Velocity
Take-off

VARIABLE (unit)

Brittney Reesest(USA)1 Place

Olga
KUCHERENKO
nd(RUS) 2 Place

Ineta RADEVICA
rd(LAT) 3 PlaceRESULT (m)

6.82

6.77

6.76

3Last (m)

1.99

2.11

2.17

2Last (m)

2.92

2.83

2.93

1Last (m)

1.92

2.18

2.13

Relative Length 2Last/3Last (%)

147

134

135

Relative Length 1Last/2Last (%)

66

77

73

Horizontal Vel. at Touch Down (m/s)

9.03

8.64

8.57

Horizontal Vel. at Take-off (m/s)

7.86

7.46

7.86

Loss of Horizontal Vel.
During Ground Contact (m/s)

1.17

1.18

0.71

Vertical Velocity at Take-off (m/s)

3.02

3.04

2.87

Resultant Velocity at Take-off (m/s)

8.42

8.07

8.37

Take-off Angle (deg)

21.0

22.2

20.1

Vertical Height of CoM

1.26

1.28

1.23

Take-off Distance :Horizontal Position of CoM (m)Relative to Foot

0.44

0.45

0.36

Duration (sec)

0.133

0.134

0.116

IAAF World Championships Daegu 2011

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Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
- August 29, 2011 -IAAF World Championships Daegu 2011

Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(Carmelita JETTER, USA - 100M Women’s Final)(August 29, 2011)

Biomechanical Analysis of Men’s 100 meter
20m
30m
40m
50m
60m
70m
80m
90m 100m Max Distance Total
RANK 10m
Avg.
Avg.
Avg.
Avg.
Avg.
Avg.
Avg.
/Avg.
Avg.
Avg. speed at Max Time
/
speed
speed
speed
speed
speed
speed
speed
speed
speed
speed
LANE
(m/sec) Speed (sec)(m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec)
Carmelita
JETER
(USA)

1/4

5.16

8.99

9.95

10.39 10.51 10.53 10.43 10.25 10.12

9.83

10.54

58.4

10.90

Speed Curve (Jeter Carmelita, USA- 100M Final)

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011(100 M Women - Final Shot Put Women - Final)(August 29, 2011)

Biomechanical Analysis of Women’s 100 meter(Final)Rank /Lane

Name

Parameter

1/
4Carmelita
JETER (USA)
Total Steps:
50.5

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.32

4.11

5.73

7.35

8.97

9.80

10.90

Avg. Speed (m/s)

5.60

9.53

10.47

10.52

10.45

10.32

9.52

-89.5 m -100 m

Avg. Step L (m)1.98

Avg. Step Freq.

4.63

Rank /Lane

Name

Parameter2/
8Veronica
CAMPBELL-B
ROWN (JAM)
Total Steps:
49.6-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.39

4.17

5.81

7.42

9.03

9.85

10.97

Avg. Speed (m/s)

5.44

9.57

10.34

10.54

10.60

10.37

9.35

Avg. Step L (m)2.02

Avg. Step Freq.

4.52

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Rank /Lane

Name

Parameter

3/5

Kelly-Ann
BAPTISTE(TRI)

Total Steps:
50

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.20

4.11

5.76

7.39

9.02

9.85

10.98

Avg. Speed (m/s)

5.92

8.87

10.32

10.43

10.41

10.24

9.32

-89.5 m -100 m

Avg. Step L (m)2.00

Avg. Step Freq.

4.55

Rank /Lane

Name

Parameter

4/
3

S.A. FRASERPRYCE(JAM)

Total Steps:
50

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.32

4.10

5.73

7.35

8.98

9.85

10.99

Avg. Speed (m/s)

5.60

9.53

10.47

10.45

10.43

9.85

9.18

Avg. Step L (m)2.00

Avg. Step Freq.

4.55

Rank /Lane

Name

Parameter

5/2

Blessing
OKAGBARE(NGR)

Total Steps:
47.4

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.36

4.14

5.84

7.49

9.15

9.99

11.12

Avg. Speed (m/s)

5.50

9.59

10.00

10.30

10.24

10.12

9.26

-89.5 m -100 m

Avg. Step L (m)2.11

Avg. Step Freq.

4.26

Rank /Lane

Name

Parameter

6/6Kerron
STEWART(JAM)

Total Steps:
47-89.5 m -100 m-89.5 m -100 m

0-13 m -30 m

-47 m

-64 m

-81 m

Lap time (sec)

2.38

4.18

5.84

7.50

9.14

9.98

11.15

Avg. Speed (m/s)

5.47

9.41

10.24

10.28

10.32

10.20

8.95

Avg. Step L (m)2.13

Avg. Step Freq.

4.22

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Rank /Lane

Name

Parameter

7/
1

Ivet LALOVA(BUL)

Total Steps:
50

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.38

4.22

5.94

7.60

9.27

10.12

11.27

Avg. Speed (m/s)

5.46

9.24

9.90

10.20

10.22

9.92

9.16

Avg. Step L (m)2.00

Avg. Step Freq.

4.44

Rank /Lane

Name

Parameter

8/
7Marshevet
MYERS (USA)

Total Steps:
47.6

0-13 m -30 m

-47 m

-64 m

-81 m

-89.5 m -100 m

Lap time (sec)

2.41

4.25

5.94

7.62

9.28

10.14

11.33

Avg. Speed (m/s)

5.39

9.26

10.04

10.14

10.22

9.96

8.80

Avg. Step L (m)2.10

Avg. Step Freq.

4.20

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Biomechanical Analysis of Women’s Shot put (Final)
Ranking

COUN
TRY

RESULT
WCH(m)

SB before
WCH(m)

Release
Velocity(m/s)

Release Release
Angle
Height(deg.)(m)

Inclination Angle atRelease (deg.)

Style

Forearm

Upperarm

1

Valerie
ADAMS

NZL

NZL

21.24 20.78

2.21%

13.82

36.7

2.25

39.6

41.2

2

Nadzeya
OSTAPCHUK

BLR

BLR

20.05 16.76

19.48%

13.45

38.2

1.98

38.7

40.3

Jillian
3 CAMARENA-WI
LLIAMS

USA

USA

20.02 20.18

-0.8%

13.21

35.7

2.06

37.3

38.8

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(Pole Vault Men - Final)(August 29, 2011)

Biomechanical Analysis of Men’s Put Vault (Final)
BIB

NAME

COUNTRY

Place

SeasonBest(m)Record(m)VA*(m/s)*848

Pawel
WOJCIECHOWSKI

POL

1

5.81

5.90

9.15

5.34

16

276 Lázaro BORGES

CUB

2

5.75

5.90

9.89

5.54

20

RenaudLAVILLENIE

FRA

3

5.90

5.85

9.95

5.64

18

9.66

5.51

412
Mean

Approach Number of
Position#(m)STEPs* VA : 5 m Run-up velocity before takeoff#AP : Take-off Position at the heel from the cut in box

Biomechanical Analysis of Men’s Pole Vault (Final)
Variable
BIB

NAME

848

Pawel
WOJCIECHOWSKI

32.50

4.33

7.50

2.03

3.69

*Fig.1.

*Fig.2.

276 Lázaro BORGES

36.44

4.35

8.38

2.28

3.68

*Fig.3.

*Fig.4.

RenaudLAVILLENIE

35.09

4.02

8.74

2.06

4.48

*Fig.5.

*Fig.6.

34.68

4.23

8.21

2.12

3.95

412
Mean

Total
Approach
Avg.
Avg. Step
Approach
ElapsedApproachlengthDistance(m) Time (Sec) Velocity (m/s)

Step
Step
Frequency
Length (m)(N/Sec)IAAF World Championships Daegu 2011

Velocity(m/s)

164/207

Pawel WOJCIECHOWSKI

st

1

5.90m

Figure 1. Step length during approach

Figure 2. Velocity for each Step during approach

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Lázaro BORGES 2nd

5.90m

Figure 3. Step length during approach

Figure 4. Velocity for each Step during approach

IAAF World Championships Daegu 2011166/207

Renaud LAVILLENIE

3rd 5.85m

Figure 5. Step length during approach

Figure 6. Velocity for each Step during approach

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(Usain Bolt, JAM - 100M men’s Semi Final)(August 29, 2011)

Biomechanical Analysis of Usain Bolt 100 meter
10m
20m
30m
40m
50m
60m
70m
80m
90m 100m
RANK Avg.
Max Distance Total
Avg.
Avg.
Avg.
Avg.
Avg.
Avg.
/Avg.
Avg.
Avg.
/
speed speed speed speed speed speed speed speed speed speed speed at Max TimeLANE (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) Speed (sec)Usain Bolt
(JAM) Round 1
Usain Bolt
(JAM) Semi Final

1/6

5.30

9.63

10.78 11.31 11.59 11.64 11.59 11.38 10.94 10.12 11.64 55.27 10.10

1/3

5.30

9.58

10.71 11.32 11.58 11.71 11.71 11.61 11.25 10.15 11.72 56.17 10.05

Speed Curve (Usain Bolt, JAM - 100M)

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Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
- August 30, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(High Jump Men - Qualification Group A)(August 30, 2011)

Biomechanical Analysis of the High Jump Men - Qualification(Group A)*The ratio of stride length to result

IAAF World Championships Daegu 2011

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Events & Phases

Stromotion (Jesse Williams, USA)

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(Pole Vault Women - Final)(August 30, 2011)

Biomechanical Analyses of Women’s Pole Vault (Final)* VA : 5 m Run-up velocity before takeoff#

AP : Take-off Position at the heel from the cut in box

IAAF World Championships Daegu 2011172/207

Biomechanical Analyses of Women’s Pole Vault (Final)

Fabiana MURER(BRA)

1st 4.85m

Figure 1. Step length during approach

Figure 2. Velocity for each step during approach

IAAF World Championships Daegu 2011173/207

Martina STRUTZ(GER)

nd

2

4.80m

Figure 3. Step length during approach

Figure 4. Velocity for each step during approach

IAAF World Championships Daegu 2011174/207

Svetiana FEOFANOVA(RUS)

rd

3

4.75m

Figure 5. Step length during approach

Figure 6. Velocity for each step during approach

IAAF World Championships Daegu 2011175/207

Elena ISINBAEVA(RUS)

th

6

4.65m

Figure 7. Step length during approach

Figure 8. Velocity for each step during approach

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
(Women's Pole Vault)(August 30, 2011)

Biomechanical Analysis of Women’s Pole Vault (FINAL)

IAAF World Championships Daegu 2011

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Speed Curve of Women’s Pole Vault (FINAL)

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Triple Jump Women - Qualification (Mabel Gay)
(August 30, 2011)

Biomechanical Analysis of the Triple Jump Women- Qualification (Mabel Gay)

Date : 30 August 2011

IAAF World Championships Daegu 2011179/207

Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
- September 1, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
High Jump Men - Final(September 1, 2011)

Biomechanical Analysis of the High Jump Men - Final

IAAF World Championships Daegu 2011

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Event & Phase

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Shot Put Men - Qualification (Group A & Group B)(September 1, 2011)

Biomechanical Analysis of Men's Shot put
Qualification (Group A & Group B)

IAAF World Championships Daegu 2011

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In-Sung Hwang Result 17.75m

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Triple Jump Women - Final(September 1, 2011)

Biomechanical Analysis of Triple Jump Women - Final

IAAF World Championships Daegu 2011

185/207

Scientific Research Project Biomechanical Analyses
at the IAAF World Championships Daegu 2011
- September 2, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
100 M Hurdle Women -Round 1(September 2, 2011)

Biomechanical Analysis of Women’s 100 meter Hurdle(Round 1)

IAAF World Championships Daegu 2011

187/207

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
200 M Men - Semi Final(September 2, 2011)

Biomechanical Analysis of Men’s 200 meter(Usain Bolt, Semi-Final)

IAAF World Championships Daegu 2011

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IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
200 M Women - Semi Final(September 2, 2011)

Biomechanical Analysis of Women’s 200 meter (Final)

IAAF World Championships Daegu 2011

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IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Javelin Throw Women - Final(September 2, 2011)

Biomechanical Analysis of Javelin Throw Women - Final

IAAF World Championships Daegu 2011

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IAAF World Championships Daegu 2011

194/207

IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Long Jump Men - Final(September 2, 2011)

Biomechanical Analysis of Long Jump Men - Final

IAAF World Championships Daegu 2011196/207

Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Shot Put Men - Final(September 2, 2011)

Biomechanical Analysis of M en's Shot put - Final

IAAF World Championships Daegu 2011

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IAAF World Championships Daegu 2011

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Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Triple Jump Men - Final(September 2, 2011)

Biomechanical Analysis of Triple Jump Men
Qualification Group A

IAAF World Championships Daegu 2011199/207

Scientific Research Project Biomechanical Analyses
at theIAAF World Championships Daegu 2011
- September 3, 2011 -Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
200 M Women - Final(September 3, 2011)

Biomechanical Analysis of Women’s 200 meter (Final)

IAAF World Championships Daegu 2011

201/207

IAAF World Championships Daegu 2011202/207

Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
High Jump Women - Final(September 3, 2011)

Biomechanical Analysis of the High Jump Women - Final

IAAF World Championships Daegu 2011

203/207

Event & Phase

Anna Chicherova(RUS)
IAAF World Championships Daegu 2011

204/207

Scientific Research Project
Biomechanical Analyses
at theIAAF World Championships Daegu 2011
Javelin Throw Men - Final(September 3, 2011)

Biomechanical Analysis of Javelin Throw Men - Final

IAAF World Championships Daegu 2011205/207

IAAF World Championships Daegu 2011

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