Knee and ankle joint stiffness in sprint running
Knee and ankle joint stiffness in sprint running
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DOI：
10.1097/00005768-200201000-00025
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发表时间：
2002-01-01
期刊：
影响因子：
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通讯作者：
Kyröläinen, H
中科院分区：
文献类型：
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作者：
Kuitunen, S;Komi, PV;Kyröläinen, H
引言：刚度通常被认为是我们神经肌肉系统的一种调节特性。本研究旨在探讨短跑运动中踝、膝关节僵硬度的调节。方法：10名男子短跑运动员以70%、80%、90%和100%的恒定相对速度在测力台上跑。地面反作用力。收集运动学和肌电图参数。结果如下：结果表明，随着跑步速度的增加，踝关节的平均关节刚度（关节力矩的变化除以关节角度的变化）保持不变（7 N·m·deg（-1）），膝关节的平均关节刚度从17 N·m·deg（-1）增加到24 N·m·deg（-1）（P < 0.01）。结论：所观察到的恒定踝关节刚度可能取决于（恒定）肌腱刚度，因为它在小腿三头肌肌肉-肌腱单元中起主导作用。因此，我们的结论是，在短跑的弹簧般的行为，腿可能会调整通过改变刚度的膝关节。然而，在复杂的运动任务中，如短跑，踝关节和膝关节的刚度可能是由个人的力学和神经特性控制。
Introduction: Stiffness has often been considered us a regulated property of the neuromuscular system. The purpose of this study was to examine the ankle and knee joint stiffness regulation during sprint running. Methods: Ton male sprinters ran at the constant relative speeds of 70, 80, 90, and 100% over a force platform. and ground reaction forces. kinematic, and EMG parameters were collected. Results: The results indicated that with increasing running speed the average joint stiffness (change in joint moment divided by change in joint angle) was constant (7 N.m.deg(-1)) in the ankle joint and increased from 17 to 24 N.m.deg(-1) (P < 0.01) in the knee joint. Conclusion: The observed constant ankle joint stiffness may depend on (constant) tendon stiffness because of its dominating role in triceps surae muscle-tendon unit. Thus, we conclude that in sprint running the spring-like behavior of the leg might be adjusted by changing the stiffness of the knee joint. However, in complicated motor task, such as sprint running, ankle and knee joint stiffness might be controlled by the individual mechanical and neural properties.