Yu Bing, Herman Daniel, Preston Jennifer, Lu William, Kirkendall Donald T, Garrett William E
University of North Carolina at Chapel Hill, 27599-7135, USA.
Am J Sports Med. 2004 Jul-Aug;32(5):1136-43. doi: 10.1177/0363546503262204. Epub 2004 May 18.
A small knee flexion angle in landing tasks was identified as a possible risk factor for noncontact anterior cruciate ligament injuries that are common in sports.
A specially designed knee brace with a constraint to knee extension would significantly increase the knee flexion angle at the landing of athletic tasks preceded with horizontal movement components, such as stop-jump tasks.
Repeated measure design for brace effects.
Three-dimensional videographic and force plate data were collected for 10 male and 10 female recreational athletes performing a stop-jump task with and without the specially designed brace. Knee flexion angle at landing, maximum knee flexion angle, and peak ground reaction forces during the stance phase of the stop-jump task were determined for each subject with and without the knee brace.
The knee brace decreased the knee flexion angle at the landing by 5 degrees for both genders but did not significantly affect the peak ground reaction forces during the landing.
The specially designed knee brace may be a useful device in the prevention and rehabilitation of noncontact anterior cruciate ligament injuries in sports.
在落地任务中膝关节屈曲角度较小被确定为非接触性前交叉韧带损伤的一个可能风险因素，此类损伤在体育运动中很常见。
一种专门设计的带有限制膝关节伸展功能的护膝，会显著增加在带有水平运动成分的体育任务落地时的膝关节屈曲角度，比如急停跳任务。
对护膝效果采用重复测量设计。
收集了10名男性和10名女性业余运动员在佩戴和不佩戴这种专门设计的护膝情况下完成急停跳任务时的三维摄像和测力台数据。确定了每位受试者在佩戴和不佩戴护膝时急停跳任务站立阶段的落地时膝关节屈曲角度、最大膝关节屈曲角度以及地面峰值反作用力。
这种护膝使两性落地时的膝关节屈曲角度均减小了5度，但对落地时的地面峰值反作用力没有显著影响。
这种专门设计的护膝在预防和康复运动中非接触性前交叉韧带损伤方面可能是一种有用的器械。
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