The effect of speed on leg stiffness and joint kinetics in human running
The effect of speed on leg stiffness and joint kinetics in human running
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DOI：
10.1016/s0021-9290(99)00133-5
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发表时间：
1999-12-01
影响因子：
2.4
通讯作者：
Metzler, V
中科院分区：
文献类型：
--
作者：
Arampatzis, A;Brüggemann, GP;Metzler, V
本研究的目的是检验以下假设：（a）理论计算值（McMahon和Cheng，1990年）之间存在差异。Journal of Biomechanics 23，65-78）和弹簧-质量模型的运动学测量的长度变化，以及（B）腿弹簧刚度、踝弹簧刚度和膝弹簧刚度受跑步速度的影响。13名运动员参加了这项研究。使用“Kistler”测力板（1000 Hz）测量力。使用两台高速（120 Hz）摄像机记录运动学数据。每位运动员都完成了以五种不同速度（大约）跑步的试验。2.5、3.5、4.5、5.5和6.5 m/s）。跑步速度影响腿部弹簧刚度、有效垂直弹簧刚度和膝关节处的弹簧刚度。5种速度下踝关节弹簧刚度差异无统计学意义（p < 0.05）。弹簧-质量模型的理论计算长度变化显著（p < 0.05）高估了实际长度变化。对于高达6.5 m/s的跑步速度，腿部弹簧刚度主要受膝关节处刚度变化的影响。(C)1999 Elsevier Science Ltd.保留所有权利。
The goals of this study were to examine the following hypotheses: (a) there is a difference between the theoretically calculated (McMahon and Cheng, 1990. Journal of Biomechanics 23, 65-78) and the kinematically measured length changes of the spring-mass model and (b) the leg spring stiffness, the ankle spring stiffness and the knee spring stiffness are influenced by running speed. Thirteen athletes took part in this study. Force was measured using a "Kistler" force plate (1000 Hz). Kinematic data were recorded using two high-speed (120 Hz) video cameras. Each athlete completed trials running at five different velocities (approx. 2.5, 3.5, 4.5, 5.5 and 6.5 m/s). Running velocity influences the leg spring stiffness, the effective vertical spring stiffness and the spring stiffness at the knee joint. The spring stiffness at the ankle joint showed no statistical difference (p < 0.05) for the five velocities. The theoretically calculated length change of the spring-mass model significantly (p < 0.05) overestimated the actual length change. For running velocities up to 6.5 m/s the leg spring stiffness is influenced mostly by changes in stiffness at the knee joint. (C) 1999 Elsevier Science Ltd. All rights reserved.