Lower extremity forces and torques during systematic variation of non-weight bearing motion.
Lower extremity forces and torques during systematic variation of non-weight bearing motion.
复制标题
非负重运动系统变化期间下肢的力和扭矩。
DOI：
10.1016/0021-9290(94)91042-1
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发表时间：
1978
期刊：
影响因子：
--
通讯作者：
Elizabeth M. Roberts
中科院分区：
文献类型：
--
作者：
Ronald F. Zernicke;Elizabeth M. Roberts
当合成的肢体速度被系统地改变时，计算踝关节、膝盖和髋关节的自由运动的分量和合成的外力和扭矩。电影和建模技术被用来分析五名熟练的足球运动员的45次试验，他们表演了慢、中、快三种速度的踢球。将具有运动学数据和节段质量估计的下肢模型合并到计算机程序中，以量化力学变量。随着踢球速度的增加，所有运动要素的大小都呈单调增加。随着肢体速度的变化，关节处的净平行和垂直外力作用的最大值以及所产生的扭矩也有显著差异。
Component and resultant external forces and torques at ankle, knee, and hip joints of unrestrained lower extremity motion were computed as resultant limb velocities were systematically changed. Cinematographic and modeling techniques were used to analyze 45 trials of five skilled soccer players who performed slow, medium and fast velocity kicks. A model of the lower extremity was incorporated, with kinematic data and segment mass estimates, into computer programs to quantify the mechanical variables. Monotonic increases in magnitudes of all kinetic elements occurred as the velocity of kicking was increased. Significant differences were also observed in the maximum values of the net parallel and perpendicular external force actions, and resultant torques at the joints with changes in limb velocity.