| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 99 === The purpose of this study was to investigate the kinematical variations among the backhand drive in diagonal and straight line when receiving backspin and topspin services. Eight male collegiate elite table tennis players(age: 23±5yrs, hight: 172.5±.6.2cm, weight: 67.1±11.2kg, experience: 13.2±2.7yrs) in Taiwan were served as the participants. Ten Vicon Motion Capture systems MX13+ (250 Hz) were used to collect the movements of backhand drives, and the Vicon Nexus 1.4 & Visual 3D soft ware were used to calculate the kinematic parameters. All the variables were tested by Friedman two-way analysis of variance of non-parametric statistical test which was calculated by SPSS 19.0, and the significant levels as α = .05. The results as follows: The elite collegiate male table tennis players performed backhand drive with the similar height and the similar percentage duration time in diagonal and straight line when receiving backspin and topspin services. It’s not only need lower COM, but also needed the greater racket velocity, swing trajectory angle and racket tilt angle of the contect point in receiving backspin than topspin services. In backswing phase, the rotation angle of shoulder and hip axis were greater in receiving backspin than receiving the topspin services. In the swing phase, the shoulder and the hip axis rotation angles in returning drives to the diagonal were greater than to the straight line. In the joint angle and angular velocity of the upper and lower extremities, due to different spin and direction variations, the main trend showed that the drives for receiving backspin was greater than the topspin; driving return in diagonal were greater than the straight line. Base on the results of this study, we recommen that the table tennis players should increase the preparation movement and ball initial velocity to perform the drives to receive the backspin serves than receive the topspin serves. The players should increase the trunk rotation angle, trunk angular velocity and the angular velocities of the upper and the lower limbs to perform the diagonal line drives in the table tennis game.
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