Three-dimensional DLT video analysis was applied to analyze the spikes of Chinese women's volleyball player Wang Yimei. The result shows that the maximal level speed of Wang Yimei in run-up is 375cm/s. The distance between the two feet in takeoff has a close relationship to takeoff time, i.e., the shorter the distance between the two feet, the shorter the takeoff time. And the takeoff movement completes quicker. The technical characteristics of Wang Yimei in jumping spike is that she hits the ball at a high point and twists her body backward reasonably before hitting the ball. Thus the body torsion angle is enlarged so as to help bend the body quickly and speed up the torsion angular velocity in hitting. This accelerates the speed of the upper part of the sternum and the speed of the shoulder, elbow, finger and palm joints so as to reach the maximal speed. |