Dissertations and Theses @ UNI


Open Access Thesis


Ankle; Joints--Range of motion; Posture;


The purpose of this study was to determine the effect that the McDavid Ankle Guard™ (McDavid Knee Guard Inc., Chicago, Illinois) and the Active Ankle Trainer™ (Active Ankle Systems Inc., Louisville, Kentucky) had on the dynamic postural stability of recreational athletes and what differences existed between males and females on stability. It was hypothesized that wearing an ankle orthosis would improve postural stability and the Active Ankle Trainer™ would be superior to the McDavid Ankle Guard™ and the control (no brace). Additionally, it was hypothesized that females would have better stability when compared to the male subjects under all conditions.

Twenty-four healthy recreational athletes (18-26 years) served as subjects in this study. Subjects were randomly assigned to brace and stance order (single leg and bilateral leg stance) for testing. A 20-second test was performed on the Biodex Balance System at a stability Level of 2. The instrumentation then produced a measurement of overall postural stability for each of the testing sessions.

Results indicated that the ankle braces did not improve postural stability of the subjects when compared to the control condition. In addition, females were found to have significantly better postural stability when compared to the males.

Year of Submission


Degree Name

Master of Arts


School of Health, Physical Education, and Leisure Services

First Advisor

Forrest Dolgener

Second Advisor

Richard Williams

Third Advisor

Kevin Finn


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Date Original


Object Description

1 PDF file (63 leaves)



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