Original articleRisk-Factor Analysis of High School Basketball–Player Ankle Injuries: A Prospective Controlled Cohort Study Evaluating Postural Sway, Ankle Strength, and Flexibility
Section snippets
Participants
Our institutional review board approved this study. Members of 10 teams who registered and competed in the first league of the High School Basketball Association, Taiwan, Republic of China (ROC), were selected before the 2003 season as eligible subjects. The teams were selected because their schools have indoor basketball stadiums with standard sports floors (hard maple wood, 28×15m) and no specifically designed prevention programs for ankle injury. Five teams with 70 players (age, 16.7±1.2y)
Results
The duration of the 2003 basketball season was estimated by coaches for each team, with a mean of 46.0 ± 2.5 weeks. Eighteen ankle sports injuries were recorded for 42 players during the follow-up season, and 11 occurred in the dominant foot and 7 occurred in the nondominant foot. Fourteen and 4 injuries were categorized as mild and moderate degrees, respectively. Age, physical characteristics, training history, and training hours did not differ significantly between injured and uninjured
Discussion
Findings of this study reveal that only the players who displayed a high variation of postural sway were most likely to have an injured ankle during the basketball session (see table 2). Significant differences of the variation between the uninjured and injured ankles in the ML direction were found. This may be because postural sway represents the ability to maintain a standing balance, and a large variation of postural sway may indicate inconsistent or poor control of ankle stability.
Conclusions
Results of the high postural sway in eyes-open 1-leg standing test before basketball session correlated significantly with subsequent ankle injuries, although it could explain only a slight increase of prevalence in the rate of ankle injury. However, we suggest that sports medicine personnel may use this 1-leg standing as a screening tool to recommend balance training before the basketball season. Further studies are suggested to compare postural sway variables before and after ankle injuries.
Acknowledgment
We thank the High School Basketball Association, Taiwan, ROC, for its administrative support.
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Supported by the High School Basketball Association, Taiwan, Republic of China.
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