Alteration of Sport Performance of High Performance Heptathlon Athlete over Olympic Cycle
Authors: Milašius Kazys , Skernevičius Juozas 
Published: May 2019

In Lithuania, over the recent years a highly-skilled heptathlon athlete has been developed. She made her internationaldebut in the Sidney Olympic Games in 2000 and took the 12 th  place. Every year she kept improving her skills andexcellently prepared for the XXVIII Olympic Games in Athens where she won a silver medal.Track-and-field heptathlon requires excellent physical fitness, development of all specific features, as well as goodphysical fitness for each contest. While planning the process of a heptathlon athlete’s training, it is most important toelaborate an optimum structure of an annual cycle with regard to the competition schedule and the individual potentialof human adaptation. To be able to control the process, it is necessary to monitor the dynamics of the physical andfunctional abilities of the athlete in different periods of the annual cycle of training.The aim of the study was to analyse the dynamics of sports results of the Lithuanian heptathlon athlete A. S. in a four-year Olympic cycle and the dynamics of her physical and functional abilities over this period.We analyzed the dynamics of the sports results of A. S. over the last five years. Her body composition indices weremeasured in laboratory, with determining psychomotor response time and movement frequency per 10 s. To determineher physical abilities, we measured her single muscular contraction power (SMCP), anerobic alactic muscular power(AAMP). A running-track was used to establish the intensity of energetic processes at the anaerobic threshold level,with measuring heart rate (HR), running speed (km / h) and blood lactate concentration. The functional capacity ofthe circulatory and respiratory systems was assessed by the Roufier index (RI). Anaerobic capacity was measured witha gas analyzer at the critical intensity and anaerobic metabolism limits.The sports results of A. S. kept improving every year except 2003. In the 2004 Olympic Games she gathered 6435 pointsand won the second place. In previous years, in separate heptathlon contests the sum total of her points reached 12.7—15.6%, whereas in the 2004 Olympic Games the difference among scores got in separate contests was less. Most pointswere won in the100-m hurdling (15.1%) and the least in javelin throwing (13.3%).Data of laboratory tests showed that the quality of the SMCP and AAMP indices, which are decisive in even fivecontests of heptathlon, over the four-year Olympic cycle showed a waved dynamics, but attained a high level one monthbefore the Olympic start: her SMCP was 3.22 kgm / s / kg and AAMP 1.72 kgm / s / kg. Also, greatly improved herpsychomotor response time, which reached 160 mls, and central nervous system lability (78 movements per 10 s). Herhigh muscular power was confirmed by performing ten jumps on a running-jumping track, when the difference betweenthe highest and lowest jumps was insignificant and muscular fatigue in a series of jumps was low.In the final period of the preparation for the Olympic Games under a short-lasting load the muscular power of A. S.reached a high level and allowed her to realize physical and functional abilities.Keywords: heptathlon, four-year Olympic cycle, physical abilities, functional capacity, physical and functional abilities.