H9 Mechanical properties of the support leg joints in running

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  • H9 ランニングにおける下肢関節の機械的特性(下肢の解析)
  • ランニングにおける下肢関節の機械的特性
  • ランニング ニ オケル カシ カンセツ ノ キカイテキ トクセイ

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Abstract

The purpose of this study was to quantify the characteristics of the support leg joints in running by using the mechanical properties. The stiffness and the viscosity coefficient were used to obtain joint characteristics. Four subjects' 3-D images from motion analyses and ground reaction forces were recorded by Vioon motion analysis system and two forceplatforms. The angular velocities which contribute to vertical direction movement were extracted from joint angular velocities using Jacobian Matrix. Joint stiffness and viscosity coefficient were calculated from the joint torque and the angular velocity and angle which contribute to vertical direction movement by the equation of the torque in joint and the evaluation function. If the coefficients were negative values, compensation torques were replaced with them. In comparison among the subjects who have different running forms or between the shod and bare conditions, the differences were observed at the joint mechanical properties of the support leg joints in running.

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