The Influence of Dual Task and Gait Speed on Gait Variability in Patients With Chronic Ankle Instability

Study Overview
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Brief Summary
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Case-control study to evaluate gait parameters during different conditions between patients who suffer from chronic ankle instability and healthy individuals.

Detailed Description
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This case-control study will compare the different gait parameters such as stride time and stride length variability in different gait conditions (e.g., normal speed, normal speed with dual task, fast speed and fast speed with dual task) between healthy individuals and patients who suffer from chronic ankle instability. the measurements will be collected using the OPTOGait system installed on a treadmill.

Official Title
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The Influence of Dual Task and Gait Speed on Gait Variability in Patients With Chronic Ankle Instability - a Case-control Study

Conditions
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Chronic Instability of Joint

Intervention / Treatment
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* Other: Gait analysis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: history of at least one significant ankle sprain which occurred at least 12 months prior to enrolment in the study and was diagnosed by a physician or a physical therapist using clinical examination classifications described by Malliaropoulos et al history of at least two episodes of 'giving way', and feelings of ankle joint instability in the previously injured ankle joint of 1 year post-initial sprain the most recent injury occurred more than 6 weeks prior to the study enrolment the ability to apply full weight bearing on the injured lower extremity with no more than mild discomfort Exclusion Criteria: evidence of a concomitant injury (such as a bony injury or significant muscular/tendon injury) previous ankle surgery other pathological conditions or surgical procedures in lower extremity neurological/vestibular or any other balance disorder. The control group included healthy participants with no current or previous conditions that could affect proprioception.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 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: Basic Science
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Chronic Ankle Instability<br>Soldiers who suffer from chronic ankle instability who had a first major ankle sprain one year or more ago, and did not sustained any major ankle sprain in the last two months, will go through Gait analysis intervention. | Other: Gait analysis<br>* Gait will be analysed while participants will walk on a treadmill at different self selected speeds, using the OPTOGait system. Spatiotemporal measures are collected without the use of any markers.<br>|
| Experimental: Healthy controls<br>Healthy soldiers who are not suffering from chronic ankle instability, will go through Gait analysis intervention. | Other: Gait analysis<br>* Gait will be analysed while participants will walk on a treadmill at different self selected speeds, using the OPTOGait system. Spatiotemporal measures are collected without the use of any markers.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Stride time variability | Coefficient of variance of the stride time, measured in % by the OPTOGait system | Day 1 | 
| Stride length variability | Coefficient of variance of the stride length, measured in % by the OPTOGait system | Day 1 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Dual task general score | Participants will be asked to count backward, reducing 7 at a time, starting at different 3 digits number. The outcome measure is a calculation of the number of total answers multiple by (number of correct answers - number of wrong answers). | Day 1 |