A functional knee brace alters joint torque and power patterns during walking and running
A functional knee brace alters joint torque and power patterns during walking and running
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DOI：
10.1016/0021-9290(95)00115-8
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发表时间：
1996-05-01
影响因子：
2.4
通讯作者：
Speroni, DL
中科院分区：
文献类型：
--
作者：
DeVita, P;Torry, M;Speroni, DL
与健康受试者相比，前交叉韧带（ACL）损伤的个体在步态期间在髋关节和踝关节处使用更大的伸肌扭矩，在膝关节处使用更低的伸肌扭矩和关节功率。这些适应性变化可能是由（1）损伤导致的神经肌肉策略改变，（2）康复方案产生的训练效果，以及（3）康复期间使用的功能性膝关节支具（FKB）导致的训练效果介导的。本研究的目的是检验这一假设，即FKB可以使个人步行和跑步的扭矩和功率模式观察到在康复ACL受伤的个人。对10名健康受试者进行了有和没有FKB的步行和跑步测试。收集运动学和地面反应数据，并与逆动力学相结合，以估计关节扭矩和功率。采用双因素重复测量ANOVA（步态与膝关节状况）分析数据。行走时，FKB组的髋关节和踝关节伸肌力矩分别增加14.3%（p < 0.038）和5.1%（p < 0.003）。在跑步中，FKB组的髋关节伸肌扭矩比对照组高17.0%（p < 0.023）。不同条件下的膝关节扭矩无差异。在行走中，FKB组髋关节和膝关节所做的功分别增加11.6%（p < 0.013）和减少17.7%（p < 0.025）。结果支持了这一假设，并得出结论，FKB可能是ACL损伤步态中出现的独特关节扭矩和功率模式发展的一个致病因素。
Individuals with anterior cruciate ligament (ACL) injury use greater extensor torques at the hip and ankle and lower extensor torques and joint power at the knee during gait compared to healthy subjects. These adaptations may be mediated by (1) altered neuromuscular strategies due to the injury, (2) training effects produced by rehabilitation protocols, and (3) training effects due to the functional knee brace (FKB) used during rehabilitation. The purpose of the study was to test the hypothesis that a FKB can cause individuals to walk and run with the torque and power patterns observed in rehabilitated ACL-injured individuals. Ten healthy subjects were tested walking and running with and without a FKB. Kinematic and ground reaction data were collected and combined with inverse dynamics to estimate the joint torques and powers. Data were analyzed with a two-way repeated measures ANOVA (gait vs knee condition). In walking, the hip and ankle extensor torques were 14.3% (p < 0.038) and 5.1% (p < 0.003) greater with FKB. In running, the hip extensor torque was 17.0% greater with FKB (p < 0.023). Knee torque was not different between conditions. In walking, the work performed at the hip and knee were 11.6% greater (p < 0.013) and 17.7% lower with FKB (p < 0.025), respectively. Results supported the hypothesis and it was concluded that a FKB may be one causative factor in the development of the unique joint torque and power patterns seen in ACL-injured gait.