Publication:

男子跳馬直體塚原轉體二周半之運動學分析－以我國選手林永錫為例

中文摘要

本研究主要目的在探討男子跳馬直體塚原轉體二周半之運動學分析，以我國選手林永錫為研究對象，研究中以兩部Redlake高速攝影機（250Hz）及一部LDM300C高頻測速槍（100Hz）進行動作過程的拍攝，並使用Acqknowledge分析軟體進行助跑過程速度相關運動學參數的分析及WinAnalysis三度空間影像數位化系統軟體進行跳馬推撐及第二飛程動作分析。研究結果發現：林選手的助跑瞬間最大速度為9.27m/s、踏板速度為8.52m/s；第一飛程時離板垂直速度為4.04m/s、水平速度為7.50m/s、踝關節速度為7.23m/s、髖角為178m/s、騰起角為37度；推撐階段時的撐馬角為34度、推離角為64度、撐馬重心水平速度為4.82m/s、垂直速度為3.45m/s、推離馬時重心水平速度為3.78m/s、重心垂直速度為3.41m/s、推離馬時重心離馬水平高度為0.63m、推撐時間為0.19秒；第二飛程重心橫軸翻轉角速度平均為7.72rad/s、重心縱軸旋轉角速度平均為16.7rad/s、重心離地面最高點為2.93m、第二飛程時間為1.06秒；落地瞬間軀幹與大腿的夾角為136.3度、大腿與小腿的夾角為108.5度、水平速度為3.12m/s、垂直速度為4.87m/s、落地瞬間重心與支撐點所成的夾角為68.8度。因此由相關數據可知實驗參與者具有快速的助跑速度、踏板速度、較長的第二飛程時間、較高的騰空高度、良好的轉體技術及穩定的落地技術，而結合相關的基本能力，才能完成直體塚原轉體二周半的高難度動作。

ABSTRACT

The purpose of this study was to discuss the kinematic analysis of Tsukahara stretch 2 1/2 of male vaulting. The subject was Yung-His-Lin.Two redlake high speed video cameras at 250 Hz and one LDM300 high frequence speed testing machine (100Hz) used to record the performance,then used Acqknowledge software to do some kinematic parameters analysis of approach and Winanalysis 3 dimention visualization digitized software to do blocking and postflight movement analysis.The result was as the follows :

1.The max velocity of approach was 9.27m/s.

2.Boarding velocity was 8.52m/s.

3.Preflight take off vertical velocity was 4.04m/s and horizontal velocity was 7.5m/s;ankle velocity was 7.23m/s ;hip angle was 178 degrees.

4.The horse contacting angle was 37 degrees ;horse departing angle was 64 degrees ;horse contacting horizontal velocity of center of mass(CM) was 4.82m/s ;vertical velocity was 3.45m/s .

5.The height of horse departing was 0.63m;blocking time was 0.19 secs.

6.The mean cross axle angular velocity of CM at postflight was 7.72rad/s.

7. The mean vertical axle angular velocity of CM at postflight was 16.7rad/s.

8.The max height of postflight was 2.93m;timewas 1.06 secs.

9.The angle of trunk and thigh was 136.3 drgrees at landing phrase ;the thihg and shank was 108.5 degrees ;horizontal velocity was 3.12m/s;vertical velocity was 4.87m/s;angle of landing phrase was 68.8 degrees .

The result indicated the following:the subject should have faster velocity at approach and boarding ;longer postflight time;higher postflight height ;better twisting technic and stable landing technic.The gymnast should combine the basic ability and then he can perform the better Tsukahara stretch 2 1/2..