不同距離之飛盤正手投擲下肢運動學分析

目的：瞭解不同層級的飛盤爭奪賽選手在進行不同投擲距離下正手投擲的下肢運動學，藉由總投擲命中率、跨步距離、跨步距離比、跨步方向、投擲時間、下肢肢段速度(大腿、小腿與腳背)、肢段協調模式的分析。方法：本研究實驗參與者共9位飛盤爭奪賽選手，分別為優秀組(N=5)與次優秀組(N=4)。每位實驗參與者均進行三種不同距離之正手投擲實驗，採用獨立樣本無母數曼-惠特尼的U檢定（Mann-Whitney U test）進行差異比較。結果：優秀組（56 ± 17%）在中距離正手投擲命中率比次優秀組（32 ± 9%，）高。優秀組與次優秀組在三種距離上，跨步距離、跨步距離比、跨步方向與跨步速度均無差異。結論：一、優秀組在中距離的飛盤正手投擲成功率明顯高於次優秀組。二、優秀組與次優秀組都會因投擲距離的變遠，而增加其下肢跨步、跨步距離比、跨步方向與跨步速度。三、優秀組與次優秀組的飛盤投擲下肢肢段峰值合速度順序先是腳背，第二小腿，最後大腿。

關鍵字

飛盤；飛盤正手投擲；運動生物力學；下肢運動學

並列摘要

Objective: To understand the lower limb kinematics of different levels of Frisbee competitors in forehand throwing at different throwing distances by analyzing the total throwing success rate, stride distance, stride distance ratio, stride direction, throwing time, lower limb segment speed (thigh, calf and dorsum of the foot), and segment coordination patterns. Methods: There were 9 participants in this study, including the excellent group (N=5) and the sub-excellent group (N=4). Each participant performed three types of forehand throwing experiments with different distances, and the Mann-Whitney U test was used to compare the differences between the independent samples. Results: The excellent group (56 ± 17%) throws the middle distance forehand throw more than the sub-excellent group (32 ± 9%,). There was no difference in the stride distance, stride distance ratio, stride direction and stride speed between the excellent group and the sub-excellent group in all three distances. Conclusion: 1. The success rate of the middle distance forehand throw of the excellent group was significantly higher than that of the sub-excellent group. 2. Both the excellent group and the sub-excellent group increased their lower limb stride, stride distance ratio, stride direction and stride speed due to the longer throwing distance. 3. The peak speed of the lower limbs in the excellent and sub-excellent groups was firstly the back of the foot, secondly the lower leg and finally the thigh.