【摘要】 箭步式上挺和下蹲式上挺是上挺的两种方式,国内对这两种上挺方式的争议较大。文章从动力学特征方面对箭步挺和下蹲挺进行比较研究,为教练员和运动员认识和寻找适合自己的上挺方式提供理论依据。在研究中采用三维录像和三维测力台同步测试的方法进行研究,发现下蹲挺下蹲撑铃点低,人体重心下蹲撑铃较为迅速,杠铃上升距离短,所需杠铃上升速度小。但是下蹲挺撑铃的前后稳定角及平衡角小,稳定性差,稍有不慎就会导致动作失败。下蹲挺撑铃和起立时间较长,起立距离也较长,消耗的能量多、箭步挺反之。更多还原

【Abstract】 Split jerk and drop jerk are the two different jerk styles which have been disputed in the weightlifting circle. This paper made a comparative study of the kinematical features of these two jerks to provide coaches and weightlifters with theoretical basis for finding a suitable mode for themselves. Three-dimensional video synchronized with force platform was used in this study. The results indicate that for drop jerk the height of drop under the barbell is lower, the velocity of drop of body gravity center is higher, the rising distance of the barbell is shorter, and the rising velocity the barbell requires is less. But the stabilization angle and balance angle of drop jerk are much less and the stability is very bad, which is easily to lead to fail. The duration of drop and uprising of drop jerk is longer and the distance of uprising is also longer, the body thus will consume more energy. The split jerk is just on the opposite way.更多还原