Clinical trial NCT06159036: Effects of a Strength Training Program in Inertial Machines on Bosco Test in Youth Volleyball Players
Official title: Effects of a Strength Training Program in Inertial Machines on Squat Jump, Countermovement Jump and Abalakov in Youth Volleyball Players
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Volleyball
Player
Female
Keywords: Keywords: Inertial machines
Squat jump
Countermovent Jump
Abalakov
Lead sponsor: Universidad Autónoma de Manizales, Colombia
Sponsor class: OTHER
First posted: 2023-12-06
Enrollment: 30
Sex: FEMALE
Minimum age (years): 15
Maximum age (years): 17
Standard ages: CHILD
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: The athletes were divided into two experimental and control groups, for which the experimental group was asked to carry out a protocol that consisted of 12 weeks of intervention divided in a randomized manner, resulting in a pre and post intervention measurement
Primary purpose: PREVENTION

Brief summary: Objective: To determine the effect of strength training in inertial machines, on SJ CMJ and CMJ with arms; in youth volleyball players from the city of Cartago.

Methodology: A quasi-experimental study of quantitative order was carried out and takes up an empirical-analytical approach, quasi-experimental with pre-test - post-test evaluation. 32 female volleyball players, belonging to the minor category of the Fénix G Club of the city of Cartago Valle

Results: Both groups showed significant improvements in jump height, flight time, strength and power in the protocol that was carried out during the 12 weeks of intervention, but there was no statistically significant difference between the control groups (P = 0.356). , experimental (P = 0.984)

Conclusions:

Keywords: Inertial machines, Squat jump, Countermovent Jump, Abalakov

Detailed description: Objective: To determine the effect of strength training in inertial machines, on SJ CMJ and CMJ with arms; in youth volleyball players from the city of Cartago.

Methodology: A quasi-experimental study of quantitative order was carried out and takes up an empirical-analytical approach, quasi-experimental with pre-test - post-test evaluation. 32 female volleyball players, belonging to the minor category of the Fénix G Club of the city of Cartago Valle. The techniques that were used were: survey to determine previous injuries, adaptations that athletes may have against strength training and practice time in volleyball, observations were also developed to determine the levels of jumpability of each player, taking into account the Bosco's battery (3). For this we used:

* My jumps 2 application for IOS devices, it was used to determine the height of the CMJ, SJ, CMJ or ABK, this app was validated in 2015 by the creator, Dr. Carlos Balsalobre (15).
* Wheeler YOYO XS inertial machine contains an encoder validated by the company Chronjump (16) with this device the training program was carried out with the volleyball players, the program was subjected to expert judgment.

For the collection of information on sociodemographic variables, a data record was carried out (Weight, Height, History of injuries, etc.), in addition to this, a record per athlete for the values of each jump performed.

Results: Both groups showed significant improvements in jump height, flight time, strength and power in the protocol that was carried out during the 12 weeks of intervention, but there was no statistically significant difference between the control groups (P = 0.356). , experimental (P = 0.984)

Conclusions:

Keywords: Inertial machines, Squat jump, Countermovent Jump, Abalakov

Eligibility criteria: Inclusion criterio

* That they express their participation voluntarily in the investigation by filling out their informed consent in the informed settlement.
* Sports aptitude in the execution of the tests at the time of the intervention and/or evaluation, do not present any surgical intervention in any particular area or region of the lower limbs.
* Practice time in volleyball of at least 2 years and 1 year in strength training

Exclusion Criteria:

* Presenting serious sports injuries 6 months before or during the data collection phase (pre-test and post-test) and application of training with inertial machines.
* not complete with at least 8 weeks of strength training on the inertial machine.

Primary outcomes:
measure: Independent variable: Inertial machine program
timeFrame: 12 weeks of intervention
measure: Dependent variable: countermovement jump, squat jump and abalakov.
timeFrame: 12 weeks of intervention
Secondary outcomes:
measure: To compare the differences pre and post strength training in inertial versus conventional machines, pre-post control experiment on the SJ, CMJ and ABK in youth volleyball players.
timeFrame: 12 weeks of intervention
Other outcomes:
Locations:
city: Manizales
country: Colombia
facility: Universidad Autónoma de Manizales
state: Caldas
Study officials:
References:
citation: Balsalobre-Fernandez C, Glaister M, Lockey RA. The validity and reliability of an iPhone app for measuring vertical jump performance. J Sports Sci. 2015;33(15):1574-9. doi: 10.1080/02640414.2014.996184. Epub 2015 Jan 2.
citation: Penailillo L, Blazevich A, Numazawa H, Nosaka K. Metabolic and muscle damage profiles of concentric versus repeated eccentric cycling. Med Sci Sports Exerc. 2013 Sep;45(9):1773-81. doi: 10.1249/MSS.0b013e31828f8a73.
citation: Beato M, Dello Iacono A. Implementing Flywheel (Isoinertial) Exercise in Strength Training: Current Evidence, Practical Recommendations, and Future Directions. Front Physiol. 2020 Jun 3;11:569. doi: 10.3389/fphys.2020.00569. eCollection 2020. No abstract available.
citation: Martinez-Aranda LM, Fernandez-Gonzalo R. Effects of Inertial Setting on Power, Force, Work, and Eccentric Overload During Flywheel Resistance Exercise in Women and Men. J Strength Cond Res. 2017 Jun;31(6):1653-1661. doi: 10.1519/JSC.0000000000001635.