運動與休閒學院

Permanent URI for this communityhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/6

為配合我國社會變遷與體育發展及本校的轉型與發展，本學院於90年8月正式成立，並將原屬本校教育學院之體育學系（所）、運動競技學系、運動與休閒管理研究所調整成立運動與休閒學院，並於95學年度增設運動科學研究所：為提升本院競爭力於101學年度運動競技學系與運動科學研究所整併為「運動競技學系」，運動與休閒管理研究所與管理學院餐旅管理研究所整併為「運動休閒與餐旅管理研究所」。

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Author: search.filters.author.古國宏Subject: search.filters.subject.動力學逆過程

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    標槍投擲時槍體受力型態及地面反作用力型態之探討
    (中華民國體育學會, 2009-12-01) 古國宏; 黃長福; 廖逢錦; 蔡永川
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    優秀標槍選手投擲時槍體受力之三維動力學分析
    (中華民國大專院校體育總會, 2006-06-01) 古國宏; 黃長福; 蔡於儒
    Purposes: According to the javelin rules, a throw is valid only if the tip strikes the ground before any other part of the javelin. Therefore, it is important to control precisely the distribution of applied forces to the javelin for further distance and tip-first landing. Methods: Two synchronized Redlake high-speed cameras (250 Hz) were used to videotape an elite thrower and a javelin with three fixed non-collinear markers. The aerodynamic and inverse dynamics were taken into account in the 3D dynamic analysis. Rerults: When the hand gripped the javelin, the applied force was mainly distributed to the axial direction. At release, the javelin was controlled by distal parts of fingers, and the distribution of force was changed from the axial to the lateral direction. The lateral torque was significantly larger than the axial torque all the phase. The peaks of lateral and axial torques were 24.08 and 1.31 Nm respectively. Conclusions: The results calculated by the inversed dynamics were similar to those by previous research. In addition, the method adopted in this study is simple and has no interference of connecting wire, which could be used for further javelin research.