Biorobotics and Biomechanics Lab (BRML), Faculty of Mechanical Engineering , Technion-Israel Institute of Technology, Haifa, Israel.
J Biomech. 2010 Mar 22;43(5):969-77. doi: 10.1016/j.jbiomech.2009.10.045. Epub 2010 Jan 4.
Kinetic patterns of the lower extremity joints have been shown to be influenced by modification of the location of the center of pressure (CoP) of the foot. The accepted theory is that a shifted location of the CoP alters the distance between the ground reaction force and the center of the joint, thereby modifying torques during gait. Various footwear designs have been reported to significantly alter the magnitude of sagittal joint torques during gait. However, the relationship between the CoP and the kinetic patterns in the sagittal plane has not been examined. The aim of this study was to evaluate the association between the sagittal location of the CoP and gait patterns during gait in healthy men.
A foot-worn biomechanical device which allows controlled manipulation of the CoP location was utilized. Fourteen healthy men underwent successive gait analysis with the device set to convey three different sagittal locations of the CoP: neutral, anterior offset and posterior offset.
CoP translation in the sagittal plane (i.e., from posterior to anterior) significantly related with an ankle dorsiflexion torque and a knee extension torque shift throughout the stance phase. Likewise, an anterior translation of the CoP significantly reduced the extension torque at the hip during pre-swing.
The study results confirm a direct correlation between sagittal offset of the CoP and the magnitude of joint torques throughout the lower extremity.
下肢关节的运动学模式已被证明受到足压心（CoP）位置变化的影响。公认的理论是 CoP 位置的改变改变了地面反作用力和关节中心之间的距离，从而改变了步态中的扭矩。各种鞋类设计已被报道可显著改变步态中矢状面关节扭矩的大小。然而，CoP 与矢状面运动学模式之间的关系尚未得到检验。本研究旨在评估健康男性 CoP 在矢状面的位置与步态模式之间的关系。
使用一种可穿戴的生物力学设备来控制 CoP 位置。14 名健康男性接受了该设备设置的连续步态分析，以传达 CoP 的三个不同矢状位置：中立、前偏移和后偏移。
CoP 在矢状面（即从后向前）的平移与整个站立阶段的踝关节背屈扭矩和膝关节伸展扭矩的变化显著相关。同样，CoP 的前向平移在预摆阶段显著降低了髋关节的伸展扭矩。
研究结果证实了 CoP 的矢状偏移与整个下肢关节扭矩的大小之间存在直接的相关性。
