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.
","abstract_html":"<p>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.</p>","abstract_has_math":false,"creators":["Blum, Aaron"],"institution":null,"degree_name":"Master of Science in Kinesiology (M.S.)","degree_level":"Thesis (restricted to Georgia Southern)","degree_discipline":"Department of Health and Kinesiology","degree_department":null,"school":null,"contributors":["Barry Munkasy","A. Barry Joyner"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005-01-01T08:00:00Z","date_published":"2005-01-01T08:00:00Z","updated_at":"2026-07-24T02:27:41Z","subjects":["ETD","chronic ankle instability","relative phase dynamics","dynamical systems","functional performance test","deviation phase","Analytical, Diagnostic and Therapeutic Techniques and Equipment","Investigative Techniques","Medicine and Health Sciences"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.georgiasouthern.edu/etd/926","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Barry Munkasy","A. Barry Joyner"]},{"key":"dc:creator","label":"Author","values":["Blum, Aaron"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2014-02-19T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Department of Health and Kinesiology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis (restricted to Georgia Southern)"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Kinesiology (M.S.)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ETD","chronic ankle instability","relative phase dynamics","dynamical systems","functional performance test","deviation phase","Analytical, Diagnostic and Therapeutic Techniques and Equipment","Investigative Techniques","Medicine and Health Sciences"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalcommons.georgiasouthern.edu/etd/926"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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.
"]},{"key":"dc:title","label":"Title","values":["Lower Extremity Coordination Pattern Stability During a Single-leg Hop for Distance"]}]}],"canonical_facts":{"dc:contributor":["Barry Munkasy","A. Barry Joyner"],"dc:creator":["Blum, Aaron"],"dc:date.available":["2014-02-19T08:00:00Z"],"dc:description.abstract":["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.
"],"dc:identifier":["https://digitalcommons.georgiasouthern.edu/etd/926"],"dc:subject":["ETD","chronic ankle instability","relative phase dynamics","dynamical systems","functional performance test","deviation phase","Analytical, Diagnostic and Therapeutic Techniques and Equipment","Investigative Techniques","Medicine and Health Sciences"],"dc:title":["Lower Extremity Coordination Pattern Stability During a Single-leg Hop for Distance"],"thesis:degree_discipline":["Department of Health and Kinesiology"],"thesis:degree_level":["Thesis (restricted to Georgia Southern)"],"thesis:degree_name":["Master of Science in Kinesiology (M.S.)"]},"updated_at":"2026-07-24T02:27:41Z"}