| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 97 === The purpose of this study was to compare the kinematics variables of active and passive badminton forehand smashes. Ten male badminton first level collegiate players were served as the subjects. Ten Vicon MX-13+ cameras (Vicon, Oxford, UK, 250Hz) were used to record the 3D kinematic data and computed by Vicon Nexus 1.3 system. The nonparametric statistical test of the Wilcoxon matched-paired signed-rank test was used to compare the kinematic differences between active and passive forehand smashes at a .05 significant level. The results showed that the initial shuttle velocity during the active smash was greater than the passive smash may due to a better location of contact and the center of gravity (COG) movement, whereas the passive smash performed a shorter movement duration time. There were significant differences between the two smashes in the upper arm angles due to the variation of the posture at striking. Moreover, most of the upper arm angular velocity for the active smash was faster than the passive action. We also found that the internal rotation for the shoulder and the pronation for the wrist were the most important in the two forehand smashes. The trunk with active smash showed greater angular velocity, and seemed to accord with the stretch-shortening cycle (SSC) theory. Therefore, active smash can be beneficial to powerful attack and passive smash can be beneficial to instantaneous attack.
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