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首页> 外文会议>International Symposium on Biomechanics in Sports vol.1; 20050822-27; Beijing(CN) >THE ANALYSIS OF ANGULAR MOMENTUM OF SIDE-VOLLEY SOCCER SHOTS PERFORMED AT THREE BALL-HEIGHT
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THE ANALYSIS OF ANGULAR MOMENTUM OF SIDE-VOLLEY SOCCER SHOTS PERFORMED AT THREE BALL-HEIGHT

机译：三球高空侧射足球弹射角动量分析

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摘要

The purpose of this study was to examine side-volley soccer shots performed at three ball-height. Five amateur, right leg dominant, male soccer players (height = 173 ± 2.86 cm; weight = 68 ± 6.04 kg; age = 20.5 ± 0.5 yrs) participated in this study. Two electrically synchronized highspeed video cameras (Redlake) were used to sample the kicking motion at 250 Hz. By the three-dimensional cinematographic technical analysis, the kicking leg was modeled as a three-link kinetic chain composed of thigh, shank, and foot, from which angular velocities and angular momentum were computed. Significantly greater ball velocity and foot velocity were achieved in kicking lower ball-height, with a shorter leg-swing time. The foot moment of inertia exhibited a high value in side-volley shot performed at the lower ball-height. These results indicated that the side-volley soccer shots performed at the lower ball-height would made higher value of foot angular momentum, and benefited ball velocity.
机译：这项研究的目的是检查以3个球高进行的侧排足球射门。五名业余，右腿主导的男性足球运动员（身高= 173±2.86 cm；体重= 68±6.04 kg；年龄= 20.5±0.5岁）参加了这项研究。使用两个电同步高速摄像机（Redlake）来采样250 Hz的脚踢运动。通过三维摄影技术分析，将踢腿建模为由大腿，小腿和脚组成的三连杆动力学链，从而计算出角速度和角动量。以较低的球高踢腿时，可以显着提高球的速度和脚的速度，同时可以缩短腿部摆动的时间。脚的惯性矩在较低的球高下进行的侧抽射表现出很高的价值。这些结果表明，以较低的球高进行侧排足球射击可以使脚的角动量值更高，并有利于球的速度。

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