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在对推铅球最后用力概念界定的基础上 ,重新划分推铅球最后用力的阶段。查阅了国内外有关的文献资料 ,在此基础上进行数理统计分析 ,提出了划分推铅球最后用力阶段的新理论 :推铅球最后用力阶段是从支撑脚着地后积极蹬伸产生向前水平支撑反力开始到铅球离手的过程。整个最后用力阶段分为单支撑和双支撑 ,单支撑最后用力阶段对左趾向前水平位移、身体重心速度水平向前增量有积极的作用 ,促进左脚积极着地进入双支撑最后用力阶段。在训练中选择提高下肢离心 -向心收缩能力的练习 ,提高力量训练效果。
On the basis of the concept of the last shot of the shot put, the final stage of putting the shot put is re-divided. After consulting the domestic and foreign documents and statistics, this paper put forward the new theory of dividing the shot put into the last force stage: Force began to shot the ball to leave the process. The whole last stage of force is divided into single support and double support, single support last stage of force on the left toe horizontal displacement, the body forward increase the level of the center of gravity has a positive role in promoting the positive left foot into the dual support the final stage of force. In training choose to improve lower extremity centrifugal - concentric contractility exercises, improve strength training effect.