武术套路优秀运动员旋风脚转体720°接马步动作的运动生物力学分析

Biodynamical analysis of excellent Wushu routine player’s move of a whirlwind kick with a 720° turn followed by a horse-riding style halt

通过三维高速摄影,对优秀武术套路运动员旋风脚转体720°接马步动作进行了分析。结果发现,在助跑阶段不是助跑速度越快越好;在起跳阶段的缓冲时段,左膝角屈膝幅度、身体重心的下降值和重心水平速度的下降值呈显著性相关;在起跳阶段的前蹬伸时段,右腿着地时脚掌内扣、及时快速蹬伸,几乎没有做退让性动作,同时左腿的加速蹬伸、左臂快速摆动的协调配合是关键技术;在起跳阶段的后蹬伸时段,右腿蹬伸的幅度更大,两腿及上肢协调的"蹬摆结合"至关重要。右脚有效制动,可增大人体腾起角度;在腾空阶段,里合击响腿时刻均在人体重心上升时段,接近人体重心最高点。里合击响腿完成后,需及时双臂合抱、双腿伸直使人体尽量成一"直棍";落地成稳固马步动作关键在于空中转体完成后尽快伸展肢体,增大人体转动惯量。

By means of 3D high speed photography, the author analyzed excellent Wushu routine player＇s move of a whirlwind kick with a 720° turn followed by a horse-tiding style halt, and revealed the following findings： the run-up speed at the run-up stage is not the faster the better; during buffeting at the take-off stage, the bending angle of the left knee as well as the drop of the center of gravity and the drop of horizontal speed of the center of gravity of the body show significant correlation respectively; during forward kicking at the take-off stage, the sole of tight leg bends inward and quickly kicks out in a timely fashion without any concessive move, in the mean time, the harmonious combination of accelerative kicking of the left leg and quick swinging of the left ann is the critical technique; during backward kicking at the take-off stage, it is utmost important to increase the left leg kicking amplitude and finish the ＂kicking and swinging combination＂ harmoniously done by the two legs and upper limbs; effective braking of the left leg can increase the jump-up angle of the human body; at the jump-up stage, the moment both legs inwardly bump to make a sound happens in the period when the center of gravity of the human body rises, at a point close to the highest point of the center of gravity of the human body; when the move of both legs inwardly bumping to make a sound is competed, the player should, in a timely fashion, embrace his/her arms and strengthen his/her legs to hold the body like a ＂straight stick＂ as much as possible; the key to form a stable house-ridding style halt after landing is to extend the limbs as soon as possible after having finished the turn in the air, so as to increase the moment of inertia of the human body.