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首页> 外文会议>International Symposium on Biomechanics in Sports vol.1; 20050822-27; Beijing(CN) >LOWER EXTREMITY JOINT KINETICS DURING LANDING OF A DROP JUMP FROM DIFFERENT HEIGHTS AND LANDING SURFACES
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LOWER EXTREMITY JOINT KINETICS DURING LANDING OF A DROP JUMP FROM DIFFERENT HEIGHTS AND LANDING SURFACES

机译：从不同高度和着陆面着陆下降过程中的下肢关节动力学

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摘要

This study aimed to investigate the biomechanical effect of the lower extremity joints from a vertical fall of 30 cm and 60 cm to a soft mat and a stiff floor respectively. Result shows, from either height, the joint forces and peak joint moments decrease significantly, while the joint angles changes to a greater degree when landing on a soft mat and it needs more time from initial contact till the action stops. Each joint moment is effect of external moment and internal muscle moment together. The correct landing technique is that moments of all joints reduce simultaneously, i.e. the contraction and passive extension of muscles should be controlled in sequence and magnitude. The highest muscle moment on contact landing is observed at hip joint on both landing conditions and the muscles of the knee and ankle joints guided by the hip muscles assist each other.
机译：这项研究旨在研究下肢关节从垂直下降30厘米和60厘米到软垫和坚硬地板的生物力学作用。结果表明，从任一高度来看，关节力和峰值关节力矩都显着降低，而当关节角度在软垫上着陆时变化较大，从初始接触到动作停止需要更多的时间。每个关节力矩都是外部力矩和内部肌肉力矩共同作用的结果。正确的着陆技术是所有关节的力矩同时减少，即应按顺序和大小控制肌肉的收缩和被动伸展。在两种着陆条件下，在髋关节处都观察到接触着陆时的最高肌肉力矩，并且由髋部肌肉引导的膝关节和踝关节的肌肉相互协助。

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