对背向滑步推铅球技术中左腿摆动问题的探讨

The Left Leg Swing in the Back Slipping Shot-put

铅球投掷是一个技术性强,动作结构复杂的全身性活动的项目,它需要全身各部位的协调配合,使得人体在极短的时间内将身体各相关部位的力合理的施加于铅球上.在这其中,左腿动作(以右手投掷为例)起着决定滑步的方向、速度、重心和移动路线以及充分发挥它的效应等作用.滑步技术中常见的"跳步"和"滑步不连贯"等错误,很大程度上是由于左腿摆动不够正确造成的.因此对此问题有必要进行分析探讨.

The shot put throw is a technique-involving event in which body movements play a part.It demands the coordination of each part of the body,especially the swing of the left leg(in a right-handed cast)which decides the slipping direction,speed,center of weight and moving route so as to achieve the ideal result.Faulty slipping and jumping step are,to a certain extent,caused by incorrect swing of the left leg.Therefore it is necessary to make some analytical study.