我国优秀女子链球运动员旋转技术的运动学特征分析

Kinematics Features of Rotated Techniques of Chinese Outstanding Woman-Hammer Players

使用两台松下M9000摄像机,对2001年第9届全国运动会的女子链球决赛进行现场三维立体拍摄。选取前6名运动员最好成绩的录像进行解析,获得了一些较全面的人体运动学数据。从运动学角度,对目前我国部分优秀女子链球运动员旋转技术的时空特征进行了综合定量分析。研究结果表明:研究对象旋转阶段的链球速度增量较低,旋转阶段链球速度增量达到最大值后,随着旋转的继续链球速度增量逐圈降低;旋转中右脚离地落地的时机存在“早抬早落”、“晚抬晚落”、“晚抬早落”三种现象;在旋转过程中,右脚落地形成双支撑瞬间肩髋轴间夹角大于足髋轴间夹角的现象,并随旋转的继续逐圈减小,这是导致运动员持续加速能力逐圈减弱及链球速度增量逐圈降低的原因之一。

This article analyzed the videos of the first six players＇best achievements and got some kinematics data by using two Panasonic M9000 cameras shooting the woman-hammer finals of the Ninth Chinese Sports Meeting in 2001 on the spot. From the angle of kinematics, this article quantitatively analyzed the space-time charcteristics of rotated tehniques of Chinese outstanding woman-hammer players, The conclusions show that the hammer＇ s velocity increment is low in the rotation process, and the hammer＇s velocity increment gradually decreases as rotating when the hammer＇s velocity increment reaches the maximum in the rotation process; in rotating, the timing of fight foot＇s lift and drop exists“early lift and late drop”, “late lift and late drop”“late lift and early drop” in rotating process, the included angle of shoulder-hip is wider than that of foot-hip when right foot dropping forms two feet standing, which gradually decreases as rotating. This is one of the reasons that make the ability of athletic continuous acceleration weak and the hammer＇s velocity increment decrease.