| （1.华南理工大学 体育学院，广东 广州 510640；2.广州体育学院 教务处，广东 广州 510500） 摘 要：对第18届亚洲田径锦标赛男子铅球决赛中采用旋转技术的运动员最后用力阶段的身体重心和铅球速度进行研究，结果发现，采用旋转技术的运动员左脚着地后身体重心合速度在加速准备部分大于铅球合速度，有利于形成以身体重心为起点的鞭打动作；身体重心垂直速度为负值，说明有降重心的过程；在加速部分铅球垂直速度与水平速度和合速度的峰值呈负相关；在最后用力阶段铅球水平速度与铅球合速度的峰值呈正相关，因此与比赛成绩显著相关。 |
ZHANG Zhan-ming1，WANG Qian2
| （1.School of Physical Education，South China University of Technology，Guangzhou 510640，China；2.Office of Academic Affairs，Guangzhou Sport University，Guangzhou 510500，China) Abstract: The authors studied the body gravity center speed and the shot-put speed produced by athletes applying swiveling technique at the final stage of power explosion in the men’s shot-put final of the 18th Asian Track and Field Championships, and revealed the following findings: at the acceleration preparation stage, the resultant speed of the body gravity center produced by athletes applying swiveling technique after their left foot was landed was greater than the resultant speed of the shot-put, which is conducive to forming a whipping action which bases it starting point on the body gravity center; the vertical speed of the body gravity center was a negative value, which means that there was a process of gravity center descending; at the acceleration stage, the vertical speed and hori-zontal speed of the shot-put was negatively correlative with the resultant speed; at the final stage of power explo-sion, the peak horizontal speed of the shot-put was positively correlative with the peak resultant speed of the shot-put, therefore it was significantly correlative with the competition result. |
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