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題 名 | 棒球投手不同投球動作加速期的投球臂運動學分析 |
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作 者 | 王順正; | 書刊名 | 臺北師院學報 |
卷 期 | 8 1995.06[民84.06] |
頁 次 | 頁529-554 |
分類號 | 528.955 |
關鍵詞 | 棒球投手; 投球動作; 加速期; 投球臂; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究的目的,是以攝影法分析四名投球動作分別為上肩技法、四分之三上肩投 法、側臂投法與下肩投法的國家級棒球投手,全力投直球的加速期動作過程,並依直接線性 轉換法來探討不同投球動作加速期的投球臂二度空間變數上的差異。在兩部同步拍攝的 KODAK高速攝影機幫助之下,分別記錄四名投手全力投球的加速期動作過程,影片經KODAK 動作分析系統數位化後,投球臂各關節點座標資料經直接線性轉換原理轉換成二度空間座標 資料,並依低頻濾波法修勻處理後,再做肩關節座標系統計算投球臂肩關節之角度變化。研 究結果發現,球離手瞬間的肩關節速度佔球速百分比以下肩投法最大,肘關節相對於肩關節 的速度增加率以上肩投法最大,腕關節相對於肘關節的速度增加率以四分之三上肩投法最 大,指尖相對於腕關節的速度增加率仿以上肩投法最大。四分之三上肩投法與上肩投法在投 球時,產生較大的肩關節內旋角速度與肘關節伸展角速度,側臂投法與下肩投法的肩關節內 旋角速度與肘關節伸展角速度則較小。 |
英文摘要 | The purpose of this study was to analyze the pitching arm kinematic variables of different baseball pitchings during the acceleration phase at most effort by 3-D cinematographics analysis. In order to understand the difference of the variables at pitching arms in 3-D, the directed liner transformation was used. The subjects were national-team pitchers. Four kinds of pitching including over-throw, three-quarter-throw, side-throw, and under-throw were tested. Two high speed KODAK motion analysis system. Coordinate data were smoothed by lowpass filter. According to shouder-joint coordinate system to calculate the change of shoulder-joint angles of pitching arm. The results indicated that over-throw had the largest increasing rate of relative velocity on elbow to shouder and finger to wrist. Three-quarter-throw had the largest increasing rate of relative velocity on wrist to elbow. Under-throw had the largest shouder velocity. Three-quarter-throw and over-throw had the faster interal rotation angle velocity on shoulder and extension angle velocity on elbow than side-throw and under-throw. |
本系統中英文摘要資訊取自各篇刊載內容。