Effect of Vibration Therapy on Hip Girdle Muscles in Healthy People

Study Overview
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Brief Summary
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This clinical trial(prospective, pilot study) is to learn about the effect of whole-body vibration on hip girdle muscles in healthy children as a primary study aiming for a new clinical intervention protocol to prevent hip dislocation in patients with severe cerebral palsy.

Detailed Description
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Design: Prospective, pilot study Setting: hospital rehabilitation department Intervention: Participants will be asked to walk and jump with a surface electromyography(EMG) attached to their hip girdle muscles. After the participants are positioned(standing) on the platform of whole-body vibration device, the study practitioner will record the sEMG values from the hip girdle muscles during the vibration applied. The mean values of repeating the same process with different vibrations applications and the values before vibration will be compared by using the SPSS using the paired t-test or Wilcoxon signed rank test for comparison between before and after vibration in the same group.

Official Title
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Effect of Vibration Therapy on Hip Girdle Muscles in Healthy People

Conditions
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Hip Dislocation

Intervention / Treatment
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* Device: whole-body vibration


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy children (5 to 15 years old) Exclusion Criteria: Children with cerebral palsy, muscle paralysis, developmental or congenital hip joint abnormalities Children who underwent hip joint surgery

Ages Eligible for Study
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Minimum Age: 5 Years
Maximum Age: 15 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: Prevention
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 20 healthy children<br>20 healthy children aged 5 to 15 years , without any congenital or developmental abnormalities of their hip joint | Device: whole-body vibration<br>* After attaching the surface electromyography(EMG) to bilateral hip girdle muscles, participants will walk and jump at their comfortable speed. After investigator record the muscle activation values, participants will be asked to stand on the vibration device. While the whole-body vibration is applied, the hip girdle muscles activation values will be recorded accordingly via sEMG.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| muscle activation values on surface electromyography(sEMG) | surface muscle contraction of bilateral hip girdle muscles bilateral gluteus medius, tensor fascia lata, iliopsoas, rectus femoris muscles | 10 seconds for each session | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| VAS (Visual Analogue Scale) | a psychometric scale that is generally used in pain scale surveys and this study participants will be asked to scale the uncomfortable feelings during the vibration | 10 seconds for each session |