Term of Award

Summer 2005

Degree Name

Master of Science in Kinesiology (M.S.)

Document Type and Release Option

Thesis (restricted to Georgia Southern)


Department of Health and Kinesiology

Committee Chair

Bryan L. Riemann

Committee Member 1

Barry Munkasy

Committee Member 2

A. Barry Joyner


Author's abstract: This study was conducted to evaluate the coordination pattern stability of the lower extremity during a single-leg hop for distance, a commonly used tool in athletic rehabilitation programs and return-to-activity decisions. A dynamical systems analysis was utilized to examine single-leg hop performance of bilaterally healthy individuals and participants with unilateral chronic ankle instability (CAI). Each participant performed ten single-leg hops for distance on each leg while kinematic data were collected during takeoff and landing. Statistical comparisons of coordination pattern stability, using a deviation phase (DP) measurement, were made between groups (healthy vs. chronic ankle instability) and between leg segment couples (foot-shank, shank-thigh and thighpelvis ). There were no statistical differences between the dominant and nondominant legs of the healthy participants. Comparison of the CAI and healthy participants revealed a statistical trend towards increased DP values in the CAI involved foot-shank couple when compared to the healthy foot-shank.