Publication:

桌球反手拉球動作之軀幹與上肢運動學

本研究目的為瞭解反手拉球動作的軀幹與持拍手臂特徵，探討軀幹與上肢動作順序是否符合動力鏈原理，並探求影響球速的關鍵運動學參數。以13名大專公開組男子桌球選手為研究對象，分析中檯反手拉前衝弧圈球動作，藉由Vicon 動作分析系統，獲得軀幹與上肢動作的運動學資料，透過皮爾森積差相關方法來探求運動學參數與球速之間的相關。研究結果發現，在揮拍擊球階段，身體肢段動作出現最大角速度的順序符合動力鏈原理。在整個動作週期中肩關節的內旋/外旋之活動範圍愈小、揮拍擊球階段的肩關節屈曲活動範圍愈大，以及擊球瞬間的肩關節外展角度愈小，則球速愈快。這顯示出反手拉球動作，選手利用適度的動作幅度、快速的揮擊動作，來產生最高效能的球速表現。

The purposes of this study were, firstly to understand the characteristic factors that contributed to the movements of the trunk and racket arm on backhand drive; secondly to investigate whether the trunk and upper limb movement during backhand drive also agree to the principle of the kinetic chain; and finally to examine the key kinematic parameters that had most influenced on the ball velocity within the backhand drive. Thirteen elite collegiate male table tennis players were recruited in this study. All the movements were recorded during the backhand fast loop drive. The data were analyzed by Vicon Motion Analysis System to gather the information on the kinematic parameters from the movements of the trunk and upper limb. By using Pearson’s correlations to investigate the relationship between ball velocity and kinematic parameters. The results found the order of the highest angular velocity of the body segments during acceleration phase were consistent to the principle of kinetic chain. Moreover, results also indicated that higher ball velocity can be achieved by decreasing the range of motion of shoulder internal-external rotation during backhand drive, also by increasing range of motion of shoulder flexion during the acceleration phase, and followed by decreasing the angle of shoulder abduction at impact. By adjusting the proper body movement and getting a faster swing, may help the player to reach his/her highest ball velocity during backhand drive.