| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系在職進修碩士班 === 97 === Objective: The purposes of this study were to compare the biomechanical variables of vertical jump by different analysis methods between the high-performance and general- performance school children.
Methodology: This study employed 16 of the fifth grades as research subjects. The children were divided into two groups with 8 members each in the categories of “high performance” and “general performance”. Ten Vicon Motion Capture system high speed digital cameras (250Hz), one Kistler force platform (1250Hz) and vertical high jump measurement board were used to collect the kinematics and dynamics data during the vertical jump movements. The Mann-Whitney U Test of nonparametric statistical to test was used the differences between the two groups. The Pearson's product-moment correlation method was used to analyze the correlation among the different analysis approaches. The statistical significance level was set at α＝.05.
Findings: 1. There were significant differences observed (p<.05) for items like: the increasing height for center of gravity during vertical high jump, the amount of the vertical displacement of the center of gravity in midair, the initial velocity at the start of the jump, the maximum velocity of the center of gravity at the start of jump, the minimum joint angles for both the knee and shoulder respectively, the maximum displacement for the joint angles at hip and shoulder respectively. 2. There were significant differences observed (p<.05) for the maximum vertical ground reaction force and the impulse between “high performance” and “general performance”. 3. There were significant correlations among the all different biomechanical analysis approaches when the children performed the vertical jump movement.
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