黄志红、隋新梅推铅球技术整体动作的速度节奏

以每秒140格的速度定点拍摄了黄志红与隋新梅的最佳及较佳成绩。力图在她们运动成绩达到高水平的情况下,对其整体动作的速度节奏进行探讨。分析表明:铅球速度与身体重心速度的对比反映出黄与隋的整体动作的速度节奏还未能更合理地安排与发挥;最后用力过程在理论上应建立两个侧弓形的概念。如果黄与隋注意并稳固地形成第二侧弓形用力的良好姿势,则会有益于取得最佳投掷成绩。

The Speed and Rhythm of the Whole Shot Putting Movement of Huang Zhihong and Sui Xinmei

The pictures of the best and better performances of the shot putting movement of Huang Zhihong and Sui Xinmei weretaken at fixed positions at a speed of 140 frames per second with a home-made Chunfeng High Speed Camera.A specialstudy was made of the speed and rhythm of the whole shot putting movement of them under the condition of their best per-formence.Throuhg the comparative analysis of the speed of shot and the speed of the center of body weight,we found thatthere was still room for their improvement if they could adjust the speed and rhythm of the whole movement more reason- ably.During the final stage of force exertion,the concept of two side-arch exertions should be formed theoretically.Thebest putting performance could be achieved,if Huang Zhihong and Sui Xinmei had a good posture during the second side-arch exertion.