Effects of Postural Constraints on Overarm Throwing

• Main Authors: Chun-Hsien Lin, 林俊憲
• Other Authors: Ti-Yu Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/59093002006227145119

碩士 === 國立彰化師範大學 === 應用運動科學研究所 === 101 === The purpose of this study was to investigate the vary of course of action in three different work restrictions of throwing motion in the limb segment. Ten Vicon infrared video cameras (MXF-40, 250Hz) were synchronized to acquire kinematic data during throws. Ten health men (age 21.1 ± 1.9 year, height 171.0 ± 5.6 cm, body mass 68.2 ± 4.8 kg, mean ± SD) volunteered to take part in the present study and should be throwing the target of 10m with fixed torso throwing, posture throwing, and standing throwing and record the time of maximum velocity, maximum velocity, the time of maximum angular velocity, and maximum angular velocity in work restrictions. The repeated measures one way ANOVA with HSD post-hoc was used to define the statistical differences among the three work restrictions of the throw factor (α = .05). The results showed no significant difference in the time of maximum angular velocities of trunk rotation, shoulder internal rotation, shoulder abduction, and wrist flexion (ps > .05), the remaining parameters were significant differences (ps < .05), showing less restricted movement can be faster of the segment because of kinetic chain. In other word, the trunk and lower extremities were very important segments to transfer the operation speed in the throw.