| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 95 === Basketball is a popular game in Taiwan and it is also an essential activity in physical education courses from elementary to senior high school. The basic skills of basketball include dribbling, passing, lay-ups and shooting. Allsen pointed out that approximately 67% of the shots during the games were jump shots, suggesting that jump shots are important in basketball games. However, jump shot is a multi-segment movement, control of this multi-segment movement is important for shooting accuracy. The movement degeneracy plays an important role in performing multi-segmental coordination.
There were 7 participants who are playing in SBL recruited for this study (age (y)：22.8 ± 1.2，height (cm)：185 ± 10.1，weight (kg)：86.1 ± 10.8，training year (y)：8.8 ± 1.7). Apparatuses for the experiment included the Phasespace system (480 Hz) and two digital cameras (JVC, 30 Hz). The single hand jump shot was used as the experimental task, all participants completed 500 shots a day and one of them performed extra 1000 shots on the other day. Mean of shooting average of analyzed data was 78.6 %, for basketball jump shot, the segmental peak velocities occurred in the order of hip, knee, ankle, shoulder-elbow to the wrist. In terms of relative phase, the most stable performance of the knee-ankle and shoulder-elbow pairs coincide with the peak velocity of one or both of the involved segments which may signify the basis of a successful jump shot performance. There were no other consistent movement pattern observed in the study further provide the evidence of movement degeneracy among highly practiced performers.
|
|---|
