KINETIC AND KINEMATIC DIFFERENCES OF TWO VOLLEYBALL-SPIKING JUMPS

The purpose of this study was to investigate the net muscle moments and work on the lower limbs in two different volleyball-spiking jumps by inverse dynamics. A Kistler force platform (600 Hz) was synchronized with a Peak high speed camera (120Hz) to collect the volleyball jumping action. Sixteen volleyball players (8 males and 8 females) were the subjects of the study. The results revealed that the work done in knee joints during eccentric contraction were greater than ankle and hip joints in both two volleyball jumps. In addition, the hip has a greater work contribution on both hop and step-close jump