浅谈铁饼旋转技术中摆动腿走向对投掷远度的影响

Study on Throwing Distant Influenced by Strike of the Swinging Leg

采用文献资料法和生物力学分析法对背向旋转掷铁饼技术中摆动腿的走向进行研究,结果表明:摆动腿趋于"直线性"摆动可以相对减少摆动腿运动半径,从而降低旋转所获得动能的损耗,对于超越器械动作的完成和器械最后出手速度的增加具有促进作用;而摆动腿"弧线"摆动会延长身体旋转时间,对超越器械动作的完成有阻碍作用,影响运动成绩的提高。对于不同身体条件的运动员,应选择适合自身特点的摆动腿路线进行练习,便于更大的提高运动成绩。

This paper,using the methods of document literature and biomechanics analysis,studies strike of the swinging leg of discus throwing technology.The results show that the linearity swing can relatively decrease the moving semidiameter of the swinging leg and then reduce the exhaustion of motion energy gained from rotation.However,the arc swing is able to extend the slew time of bodies,which blocks the accomplishment of movements and athletes＇ performance.In order to gain a better achievement,it is necessary to select the suitable strike of the swinging leg.