Validation of Modified AST

Study Overview
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Brief Summary
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The objective of the study is the validate and to assess the reliability of a modified version of the Athetic Shoulder Test. The activity of peri-scapular muscles during the realization of the test will be assessed too.

Detailed Description
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The study will be divided into two sessions. A time of 7-10 days will be provided between the two sessions of tests to limit the influence of sport and training on the results. Session 1: Warm-up Realization of the Athletic Shoulder Test (with EMG captors on upper trapezius, lower trapezius and serratus anterior) Realization of the modified Athletic Shoulder Test (with EMG captors on upper trapezius, lower trapezius and serratus anterior) Session 2: Warm-up Realization of the Athletic Shoulder Test (with EMG captors on upper trapezius, lower trapezius and serratus anterior) Realization of the modified Athletic Shoulder Test (with EMG captors on upper trapezius, lower trapezius and serratus anterior)

Official Title
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Validity and Reliability of the Modified Athletic Shoulder Test

Conditions
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Strength

Intervention / Treatment
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* Other: Realization of the Athletic Shoulder Test and the Modified Athletic Shoulder Test


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: to practice an overhead sport at least 5 hours a week Exclusion Criteria: no shoulder pain no history of shoulder pain no history of shoulder surgery no scoliosis or lower limb lengths differences

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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Male

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: Realization of the Athletic Shoulder Test and the Modified Athletic Shoulder Test|The participants will have to perform both tests two times, with a 7-10 days rest period between the two sessions|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Strength of anteflexors in I position | The strength developped in the I position will be assessed with a force plateform and a handheld dynamometer | Change from baseline to 10 days | 
| Strength of anteflexors in Y position | The strength developped in the Y position will be assessed with a force plateform and a handheld dynamometer | Change from baseline to 10 days | 
| Strength of anteflexors in T position | The strength developped in T position will be assessed with a force plateform and a handheld dynamometer | Change from baseline to 10 days | 
| EMG activity of upper trapezius | EMG activity of upper trapezius will be measured with surface electrodes (Delsys Trigno) | during the first session | 
| EMG activity of lower trapezius | EMG activity of lower trapezius will be measured with surface electrodes (Delsys Trigno) | during the first session | 
| EMG activity of serratus anterior | EMG activity of serratus anterior will be measured with surface electrodes (Delsys Trigno) | during the first session |