Abstract
The purpose of this study is to quantify the dynamic contribution of the support leg joint torques to the generation of knee joint load parameters (e.g. joint force and joint constraint torque) based on multi-body dynamics. Heel-strike type runner and Fore/mid-foot strike type runners ran at 3.3m/s, and trajectories of 51 markers on the body and ground reaction forces of the support leg were measured with VICON-MX system and a force plate, respectively. The results indicate that 1) abduction and internal torques at hip joint and extension torque at knee joint are the major contributors to the generation of constraint axial torque about valgus/varus axis for rear-foot striker, and 2) abduction and internal torques at hip joint are the positive major contributors, and extension torque at knee joint and plantar torque at ankle joint are the negative contributors to the generation of lateral/medial axial component of the knee joint force expressed in shank coordinate system for rear-foot striker.
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