Effects of Hip Strengthening Training in Volleyball Players

Study Overview
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Brief Summary
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In order to examine the effects of hip strength training on upper extremity function and performance, 60 healthy volleyball players with an age range of 13 to 40 years will be included in our study. Shoulder joint range of motion, shoulder and hip muscle strength, upper extremity functional performance, and spike speed will be evaluated. Participants will be randomly divided into 2 groups as Training Group (TG) (will receive 6-week, 3 days a week, hip strength training in addition to their sport-specific training) and Control Group (CG) (will continue their sport-specific training). Evaluations will be repeated 3 times before exercise training, after 6 weeks of exercise training, and at the 12th week, and the results will be analyzed.

Detailed Description
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60 volleyball players will be included in our study. Assessments: 1. In the evaluation of upper extremity function and performance; strength of the shoulder internal and external rotator muscles will be measured with a hand-held dynamometer, shoulder internal and external rotation joint range of motion with a digital inclinometer, finally functional performance with closed kinetic chain upper extremity stability test and spike speed with a speed gun. 2. strength evaluation of the hip abductor, extensor, and external rotator muscles with a hand-held dynamometer. Participants will be randomly divided into 2 groups of 30 participants. The Training Group (TG) will receive 6 weeks of hip abduction, extension, and external rotation strengthening training in addition to their sport-specific training. Strengthening exercises will be done 3 days a week and every other day with a physiotherapist. Control Group (CG); will continue their sport-specific training. Evaluations will be repeated 3 times (before exercise training, after 6 weeks of exercise training, and at the end of the 12th week) and the results will be analyzed.

Official Title
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The Effect of Hip Strength Training on Upper Extremity Function and Performance in Volleyball Players

Conditions
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Volleyball, Healthy

Intervention / Treatment
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* Other: Training group


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Being between the ages of 13-40 Volunteer to participate, To be training at least 2-3 session a week, Having played volleyball for at least 3 years, actively participating in training and competitions, To be able to complete all the evaluations to be made in the study Exclusion Criteria: Having a systemic musculoskeletal disease, The occurrence of pain during the evaluations, History of fracture, instability or surgery in the last 6 months, Having an upper, lower extremity or spine injury (acute and/or active) in the last 6 months, Being away from sports for the last 6 months due to pain

Ages Eligible for Study
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Minimum Age: 13 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Hip strengthening exercises will be performed 3 times a week for 6 weeks in the exercise group. The control group will continue their routine sport training program.
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Training group<br>Hip strengthening exercises will be performed in the training group. | Other: Training group<br>* Hip strengthening exercises will be performed 3 times a week for 6 weeks in the training group. 3 exercises consisting of 2 sets and 10 repetitions will be performed every week. A rest interval will be given between sets.<br>|
| No Intervention: Control group<br>The control group will continue their training and matches. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Shoulder strength | Change of shoulder internal rotation and external rotation strength(in kg, with hand held dynamometer) | Baseline, 6 weeks later and 12 weeks later | 
| Upper extremity functional performance | Determine the performance with Upper Extremity Closed Kinetic Chain Stabilization Test (number of touches) | Baseline, 6 weeks later and 12 weeks later | 
| Spike speed | Determine the performance with Spike Speed Test(in km/h, with radar gun) | Baseline, 6 weeks later and 12 weeks later | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Shoulder range of motion | Change of shoulder internal and external rotation range of motion(in degree, with inclinometer) | Baseline, 6 weeks later and 12 weeks later | 
| Hip strength | Change of hip abduction, extension, and external rotation strength(in kg, with hand held dynamometer) | Baseline, 6 weeks later and 12 weeks later |