巧固球不同射球步伐射球之三度空間運動學分析
| Autor: | Yu chin lung, 余金龍 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 The 3D KINEMATIC ANALYSIS OF THE Javelin SHOT BY DIFFERENT SHOOTING GAITS OF TCHOUKBALL Abstract The purpose of this study was to investigate the Javelin shot’s kinematics parameters. Subjects were five elite tchoukball players taking lap-up, handball-shooting, right-foot jump, and two-feet jump of the shooting gaits. Two cameras (JVC 9800U；120 Hz) were used to synchronize videotape the process. APAS movement analysis system was used to digitalize films and get the 3D kinematics parameters. Each of the different shooting gaits had the best 3 valid samplings. In the study we divided the smash shooting movements in pull back phase（PBP）and smash phase（SP） to investigate the variances of the initial ball speed, ball trajectory, time of motion division, and the angles of shoulder and elbow joints.The findings of this study are listed as following. 1. The initial ball speed of five players ranged from 17.45m/s to23.97m/s in different shooting gaits. The handball-shooting gait has the higher initial ball speed, and the lap-up gait has the lower initial ball speed. 2. From the take-off to the ball released spends the different time in different shooting gaits. But the time of the SP is similar. 3. When the PB is completed, the wider the angle of shoulder joint will be resulted from lap-up gait, but right-foot jump won’t. It also shows that the angle of elbow joint in handball-shooting gait is the widest, but is the narrowest in lap-up gait. In addition to the above findings, the angles of shoulder and elbow joints are different at the PB is completed though the five players shoot in the same gait. 4. Both the angles of shoulder and elbow joints and the ball trajectory are different in different shooting gaits during the SP. When the different slope of the trunk is resulted from different shooting gaits, the angles of shoulder and elbow joints will be changed, and the ball trajectory changed at the same time. Key words: Tchoukball, different shooting gaits, kinematic analysis. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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