水球競技におけるオーバーハンドスローの動作分析

概要

論文の詳細を見る
Recently, the ball handling of water polo players in Japan is changing. The former way of lifting a ball with one hand is changing to gripping it with one hand. This study analyzed the motion of gripping a ball with one hand in order to clarify its advantage in shoot throwing. A Bolex high speed camera (64 fps) was used for the measurement, and an Elmo motion analyzer was used to analyze the motion of the gripping and the lifting. The following conclusions were obtained from the data. 1) The player who can grip a ball could jump higher making use of a repellent that was gained by pushing the ball down just before he started a vertical displacement. Moreover, the horizontal distance between the ball and the head at the rear point of the backswing in group 1 was significantly longer than that in group 2. 2) The angle of the right elbow of the player who could grip a ball was larger than the player who could not. Moreover, the horizontal displacement distance of the player who could grip a ball was significantly longer. 3) In the motion after backswing no significant differences existed between the two groups. 4) On the basis of the above-mentioned results, this study suggested that the gripping a ball with one hand would increase the shooting production, because both the vertical displacement distance and the backswing motion were larger.