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通过分析近年世界优秀铁饼运动员的投掷技术过程,笔者试将他们的技术动作特征简要归纳为“平衡旋转、持续位移和横向的弹性用力”。旋转掷铁饼技术过程,是“人体一器械”体系通过双脚与投掷圈地面的交替作用,围绕一个动态的垂直旋转轴向前旋转位移,并使器械最后沿旋转面的切线最大速度抛射出去的过程。旋转体系的平衡稳定及加速向前、上下超越扭紧的程度,对旋转技术效果至关重要。在此体系中,人体的双上肢和投掷器械在旋转过程中形成的旋转面与旋转轴之间
By analyzing the throwing process of the elite discus throwers in recent years, the author tries to summarize the characteristics of their technical movements as “balanced rotation, continuous displacement and lateral elastic force”. The technical process of rotating the discus is that the system of human body and instrument pushes and displaces a forward vertical displacement about a dynamic vertical rotation axis through the interaction between the feet and the throwing ring ground and finally ejects the instrument at the maximum speed of the tangent of the rotation plane Out of the process. The balance of the rotating system is stable and accelerates forward and upward and downward beyond the degree of tightening, which is crucial for the effect of rotating technology. In this system, the body’s upper limbs and throwing equipment in the process of rotation formed between the rotating surface and the rotating shaft