KINEMATIC ANALYSIS OF VOLLEYBALL JUMP TOPSPIN AND FLOAT SERVE

The purpose of this study is to describe the kinematic characteristics of the volleyball jump topspin and float serve. Thirteen international players performed jump topspin serves and another three players executed jump float serves participated in this study. Two JVC 9800 cameras (120Hz) recorded the players performed jump serves. The results show the jump topspin serve has greater values than the jump float serve on ball velocity, COM velocities at takeoff, jump height, spike height, takeoff to line distance, and horizontal COM displacement. In addition, the mean 1.0cm and 0.7cm of COM spike difference for jump topspin and float serve indicates that elite volleyball players have good timing control during serve action. It is suggested that results from this study can provide useful information for coaches to train volleyball jump topspin and float serve

A 3D ANALYSIS OF THE VOllEYBAll SPIKE

The purpose of this study was to identify and describe the biomechanical characteristics of the high school volleyball players jump spikes. Eleven elite male players participated in this study. Two Peak high-speed cameras (120 Hz) were genlocked to record the spiking action. The results showed that the spiking techniques of male high school volleyball players are quite similar to those of university volleyball players except for contact ball height. It is suggested that coaches should train the young players jumping ability and fast spiking motion in order to improve spiking power