Acute Effects of Whole Body Vibration in Chronic Stroke

Study Overview
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Brief Summary
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Whole body vibration has been found to be useful in promoting bone health, balance, and muscle performance in older adults. The overall aim of the proposed study is to determine whether whole body vibration (WBV) has immediate beneficial effect in neuromotor performance in patients with stroke. It is hypothesized that a single session of WBV will induce significant improvement in leg muscle strength in people with chronic stroke.

Official Title
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The Acute Effects of Whole Body Vibration Training With Different Frequencies on Neuromotor Performance in Individuals With Stroke

Conditions
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Stroke

Intervention / Treatment
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* Procedure: High frequency whole body vibration
* Procedure: Low frequency whole body vibration
* Procedure: control


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: a diagnosis of stroke stroke onset >6 months >18 years of age >able to walk for short distance independently with or without walking aid able to understand simple verbal commands Exclusion Criteria: other neurological conditions peripheral vascular disease vestibular disorders significant musculoskeletal disorders (e.g. rheumatoid arthritis) pregnancy

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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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: High frequency whole body vibration<br>This group will receive a single 10-minute session of WBV therapy. The frequency of the vibration signals will be set at 30Hz. | Procedure: High frequency whole body vibration<br>* 1 single session (10 minutes) of whole body vibration therapy at 30 Hz<br>* Other names: Whole body vibration therapy (30Hz);|
| Active Comparator: low frequency whole body vibration<br>This group will receive a single 10-minute session of WBV. The frequency of the vibration signals will be set at 20 Hz. | Procedure: Low frequency whole body vibration<br>* 1 single session of whole body vibration therapy at 20 Hz<br>* Other names: Whole body vibration therapy (20Hz);|
| Active Comparator: Control<br>This group will stand on the same vibration platform for 10 minutes, but no vibration will be given. | Procedure: control<br>* 1 single session of standing on the vibration platform, with no vibration signals delivered.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| knee extension isokinetic strength |  | 2 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Muscle activity (electromyography) of knee extensors |  | during treatment | 
| knee extension isometric strength |  | 2 weeks | 
| knee flexion isometric strength |  | 2 weeks | 
| knee flexion isokinetic strength |  | 2 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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vibration, muscle, cerebrovascular accident, exercise, rehabilitation