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

Not Applicable

Completed

• Conditions: Female; Player; Volleyball
• Interventions: Device: Inertial Strength training

• Registration Number: NCT06159036
• Lead Sponsor: Universidad Autónoma de Manizales, Colombia

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

Study Timeline

• Study Start: 2022-09-26
• Primary Completion: 2022-11-24
• Study Completion: 2023-02-01
• Study First Submitted: 2023-02-03
• Status Verified: 2023-12
• Study First Submitted QC: 2023-12-04
• Last Update Submitted: 2023-12-04
• Study First Posted: 2023-12-06
• Last Update Posted: 2023-12-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 30

Inclusion Criteria

Not provided

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Group 2	Inertial Strength training	Control group developed conventional strength training with squats, deadlifts, hip thrust jumps for 2 days and around 12 weeks.
Group 1	Inertial Strength training	Strength training in inertial machines for 2 days and around 12 weeks.

Primary Outcome Measures

Name	Time	Method
Dependent variable: countermovement jump, squat jump and abalakov.	12 weeks of intervention	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.
Independent variable: Inertial machine program	12 weeks of intervention	Power (watt)

Secondary Outcome Measures

Name	Time	Method
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.	12 weeks of intervention	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.

Trial Locations

Locations (1)

Universidad Autónoma de Manizales; 🇨🇴 Manizales, Caldas, Colombia