Validity of a Belt Mounted Accelerometer to Assess Walking Measures in Patients With Chronic Stroke

Study Overview
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Brief Summary
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The aim of this study is to validate the G-walk for several gait parameters, tested against a gold standard three dimensional camera system. This research will inform researchers and practitioners as to whether the G-Walk is a suitable and valid tool to easily assess walking ability in people with chronic stroke.

Detailed Description
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Twenty chronic stroke survivors will be recruited for this study from an independent neuro-physiotherapy practice and community exercise programme.Gait analysis will be used to look at several gait parameters through the use of a three-dimensional visual analysis system based in our Biomechanics Lab at the University of Winchester. Participants will attend testing one testing session of approximately 1 hour. During this testing session functional measures and walking trials will be assessed. Participants will first be asked to complete a set of simple movements that will contribute towards Fugl Meyer questionnaire. Twenty eight reflective markers will then be attached to specified joints and segments of the body, such as the thigh, with double sided sticky tape to allow for data collection through the camera system to collect kinematic data. The belt mounted accelerometer (G-Walk) will be positioned around the waist over the L5 vertebrae. Participants will be asked to perform 6 walking trials of 10m to collect 3D kinematic and accelerometer gait data.

Official Title
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Validity of a Belt Mounted Accelerometer to Assess Walking Measures in Patients With Chronic Stroke

Conditions
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Stroke, Gait, Hemiplegic

Intervention / Treatment
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* Device: Gwalk accelerometer walking trials


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: <3 months post stroke Lower limb impairment Able to stand and step independently Functional ambulation classifications (FAC) of 2-5 Modified Rankin Scale (MRS) of 1-3 Cognitively aware to undertake the testing session Exclusion Criteria: Unresolved deep vein thrombosis unstable cardiovascular conditions open wounds active drug resistant infection recent fractures of involved limb peripheral arterial disease incontinence severe osteoporosis non-weight bearing.
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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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Chronic Stroke<br>Twenty chronic stroke patients (>3months post-stroke) will complete a one off session in a biomechanics lab. This session will include the Fugl Meyer Questionnaire and several walking trials along a flat, level 10m walkway. During this participants will wear a belt mounted accelerometer and small reflective markers on joints. | Device: Gwalk accelerometer walking trials<br>* No intervention. Participants will wear a belt mounted accelerometer and complete walking trials to assess validity of the device<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Speed | How quickly a participant walks overground | 60 minutes | 
| Cadence | Steps taken per minute | 60 minutes | 
| Stride Length | The distance between strides | 60 minutes | 
| Swing phase duration | Percentage of the gait cycle spent in swing phase | 60 minutes | 
| Stance phase duration | Percentage of the gait cycle spent in stance phase | 60 minutes | 
| Gait cycle duration | The time it takes to complete one gait cycle | 60 minutes | 
| Double support duration | Percentage of the gait cycle spend with both feet on the ground (double support) | 60 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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stroke, validity, gait