Objectives: To evaluate dynamic stability index (DSI) differences between males and females for different jump directions. To examine both preseason DSI differences between players with and without a history of ankle sprain, and between players with and without an ankle sprain during the subsequent season.
Design: Prospective cohort design.
Participants: 47 male (22.9 +/- 3.9 y) and 19 female (21.5 +/- 2.9 y) sub-elite and elite team sport players. Main outcome measures: Ankle sprain history was collected using an injury history questionnaire. DSI of a single-leg hop-stabilization task measured preseason was collected using force plates and calculated using a Matlab program. Ankle sprains were reported during the subsequent season.
Results: Male players demonstrated larger DSI than female players on forward medial/lateral stability index (MLSI) and vertical stability index (VSI), diagonal VSI, and lateral anterior/posterior stability index (APSI) and VSI. Forward, diagonal and lateral dynamic postural stability indices (DPSI) were larger for males (p <0.001). No significant differences were found between players with and without a previous ankle sprain nor between players with and without an ankle sprain during the subsequent season.
Conclusion: Male players showed larger DSI scores than female players, indicating lower dynamic stability. Sex-specific training sessions or prevention programs should be developed. (C) 2015 Elsevier Ltd. All rights reserved.
- Ankle injuries
- Dynamic task
- Lower extremity
- Postural stability
- ANTERIOR CRUCIATE LIGAMENT
- VOLLEYBALL PLAYERS