The purpose of this study is to analyze the influence of motion of swinging arms and fee legs on the performance. The study adopted five cameras with a speed of 60 frames per second (Canon ZR-60) to film the finalists in the woman's bug jump and triple jump at the 2003 National Games. The two-dimensional film analysis based on a 14-segment and 21-point body model was conducted. The data collected was computed. According to the results, the conclusions are as follows: 1 .First at the three support phases, the angle of the upper limb arm did not significantly correlate with the horizontal and vertical speeds. 2. The angular momentum of the free leg and upper arm are negatively correlated with the actual jump distance. 3. The angles of the free leg in the step-phase and hop-phase are significantly correlated with the actual jump distance. In other words, a larger angle can produce a better result. 4. The speed of free legs during jump buffer and pressing phase is significantly correlated with actual distance. High speed of the free legs results in good performance. 5. The changes of intersection angle of takeoff legs and free legs during step phase are correlated with actual distance. It means that the two legs during step phase demonstrate bigger motions which will bring about better performance. It is suggested to enhance the drills of arm-swing techniques and training of free legs in order to increase the strength of leg drive and hence reduce the torque (pronation) of the body part.
The purpose of this study is to analyze the influence of motion of swinging arms and fee legs on the performance. The study adopted five cameras with a speed of 60 frames per second (Canon ZR-60) to film the finalists in the woman's bug jump and triple jump at the 2003 National Games. The two-dimensional film analysis based on a 14-segment and 21-point body model was conducted. The data collected was computed. According to the results, the conclusions are as follows: 1 .First at the three support phases, the angle of the upper limb arm did not significantly correlate with the horizontal and vertical speeds. 2. The angular momentum of the free leg and upper arm are negatively correlated with the actual jump distance. 3. The angles of the free leg in the step-phase and hop-phase are significantly correlated with the actual jump distance. In other words, a larger angle can produce a better result. 4. The speed of free legs during jump buffer and pressing phase is significantly correlated with actual distance. High speed of the free legs results in good performance. 5. The changes of intersection angle of takeoff legs and free legs during step phase are correlated with actual distance. It means that the two legs during step phase demonstrate bigger motions which will bring about better performance. It is suggested to enhance the drills of arm-swing techniques and training of free legs in order to increase the strength of leg drive and hence reduce the torque (pronation) of the body part.