Effects of a Strength Training Program in Inertial Machines on Bosco Test in Youth Volleyball Players

Female Clinical Trial

Official title:

Effects of a Strength Training Program in Inertial Machines on Squat Jump, Countermovement Jump and Abalakov in Youth Volleyball Players

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT06159036
• Other study ID #: APPROVAL ACT 07-19-2022_11UAM
• Status: Completed
• Phase: N/A
• Start date: September 26, 2022
• Est. completion date: February 1, 2023

Study information

• Verified date: December 2023
• Source: Universidad Autónoma de Manizales, Colombia
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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

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

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: February 1, 2023
• Est. primary completion date: November 24, 2022
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 15 Years to 17 Years

Eligibility

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.

Related Conditions & MeSH terms

• Female

Intervention

Device:
• Inertial Strength training
Low speed strength training with classic movements, derived from Olympic lifting and jumping

Locations

Country	Name	City	State
Colombia	Universidad Autónoma de Manizales	Manizales	Caldas

Sponsors (1)

Lead Sponsor	Collaborator
Universidad Autónoma de Manizales, Colombia

Country where clinical trial is conducted

Colombia, 

References & Publications (4)

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. — View 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 — View 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. — View 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. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Independent variable: Inertial machine program	Power (watt)	12 weeks of intervention
Primary	Dependent variable: countermovement jump, squat jump and abalakov.	Squat position with arms at the waist looking for a countermovement and height, the following jump squat position hold for 5 seconds and look for height without taking the hands off the waist, finally the abalakov is a jump with loose arms performing a countermovement and looking height.	12 weeks of intervention
Secondary	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.	Squat position with arms at the waist looking for a countermovement and height, the following jump squat position hold for 5 seconds and look for height without taking the hands off the waist, finally the abalakov is a jump with loose arms performing a countermovement and looking height.	12 weeks of intervention