Reliability and Validity of the Evaluation of Hip Abductors Strength (RAVEHABDS)

Study Overview
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Brief Summary
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The aim is to evaluate the intra- and inter-tester reliability, construct validity and feasibility of a new functional measurement procedure in a closed chain position on one leg. For this purpose, we will test the maximal voluntary isometric force, as well as the muscular contraction speed of the hip abductor muscles.

Detailed Description
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Within this Master thesis project, we will investigate intra- and inter-tester reliability, as well as construct validity of a measurement procedure to assess hip abductor strength in a closed-chain position. Additionally, we aim to investigate some aspects of feasibility using a questionnaire about the measurement procedure and by evaluating if the test can be completing in a suitable timeframe for practical use. To investigate intra- and inter-tester reliability, as well as construct validity, we will analyze and compare the maximal voluntary isometric strength (MVIS) and the rate of force generated (RFG) of the three groups of healthy participant (group 1: 18-30 years old; group 2: 31-65 years old; group 3: 65+ years old).

Official Title
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Reliability and Validity of the Measurement Procedure for the Evaluation of Hip Abductors Strength in Unipodal Standing Position

Conditions
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Healthy People

Intervention / Treatment
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* Other: Maximal voluntary isometric strengthening


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Persons over 18 years old, good understanding of French, German, English or Italian, with the capacity of discernment regarding their own participation in the study Exclusion Criteria: Persons with cognitive impairment or who are unable to take their own decisions about participation in the study, or who have undergone surgery on the lower limb or lumbopelvic area during the last 6 months that could contradict or influence the strength tests, will be excluded from the study

Ages Eligible for Study
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Minimum Age: 18 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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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| 18-30 years old<br>Subjects in this group is aged between 18 ans 30 years old | Other: Maximal voluntary isometric strengthening<br>* The subject is asked to perform a maximum voluntary isometric force work against a wall during 5 seconds<br>|
| 31-65 years old<br>Subjects in this group is aged between 31 ans 65 years old | Other: Maximal voluntary isometric strengthening<br>* The subject is asked to perform a maximum voluntary isometric force work against a wall during 5 seconds<br>|
| 65+ years old<br>Subjects in this group is aged over 65 years old | Other: Maximal voluntary isometric strengthening<br>* The subject is asked to perform a maximum voluntary isometric force work against a wall during 5 seconds<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Intra-tester Correlation | Strength of correlation the measured values | 1 March, 2022 | 
| Inter-tester correlation | Strength of correlation the measured values | 1 March, 2022 | 
| Construct validity | Difference between groups by comparing values | 1 March, 2022 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Feasibility of the measurement procedure | Through the administration of a feasibility questionnaire we investigate the time to perform the test, the understanding of the instructions, the fatigue, the possible pain, or the fear of falling during the test | 1 March, 2022 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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hip abductors strengthening, one-leg standing, maximal voluntary isometric strengthening, rate of force generated, dynamometer, aged category, so surgery