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- W4220956867 abstract "<p>目的：探討我國女子跳高選手助跑最後兩步與起跳動作特徵，提供給教練與選手作為改進動作之參考資料。方法：以16名女子跳高選手 (年齡20.4±5.4歲，身高170.1±4.7公分，體重58.5±5.8公斤，比賽成績1.65±0.06公尺) 為研究對象。利用兩部數位攝影機與三度空間影像分析方法，拍攝選手在全國運動會、大專校院運動會與中等學校運動會的跳高比賽過程，以動作分析系統獲得助跑最後兩步與起跳階段的運動學資料，以皮爾遜積差相關分析各項運動學參數與比賽成績之相關性，顯著水準設為α= .05。結果：與世界級選手相比，本研究選手動作特徵為助跑速度較慢，在起跳階段水平與垂直方向運動的轉換較差，起跳腿膝關節彎曲較大，起跳離地瞬間身體重心水平速度過快，起跳離地瞬間身體重心垂直速度較慢與起跳飛程角度較小。此外，助跑最後第二步水平速度、起跳腳離地瞬間身體重心垂直速度、起跳階段身體重心速度轉換率、起跳飛程角度和飛程高度皆與比賽成績達顯著相關。結論：選手應提升助跑速度與下肢爆發力，並加強起跳階段水平與垂直方向運動的轉換技術。</p> <p> </p><p>Purposes: To investigate the characteristics of the last two steps of the run-up and takeoff techniques of female high jump athletes and to provide coaches and athletes with reference information to improve high jump motions. Methods: Sixteen female high jump athletes (age: 20.4 ± 5.4 years; height: 170.1 ± 4.7 cm; body weight: 58.5 ± 5.8 kg; best performance: 1.65 ± 0.06 m) were enrolled in this study. Two digital cameras, both with three-dimensional filming methods, were used to record the Taiwanese national games, national intercollegiate athletic games, and national high school athletic games, and a motion analysis system was employed to obtain kinematic data on the last two steps of the high jump athletes’ run-up and takeoff motions. The Pearson product-moment correlation coefficient was used to analyze the correlation between the various kinematic parameters and official results, the significance level was set as α=.05. Results: Compared with world-class female athletes, the study participants registered slower run-up velocity, a weaker transfer from the horizontal to the vertical direction during the takeoff phase, a greater knee flexion angle during the takeoff phase, a faster horizontal velocity of the center of mass (COM) at the end of the takeoff, a slower vertical velocity of the COM at the end of the takeoff, and a lower takeoff angle. The horizontal velocity in the penultimate stride, vertical velocity of the COM at the end of the takeoff, velocity conversion ratio of COM during the takeoff phase, angle of takeoff, and height of COM during flight all exhibited significant relationships with high jump performance. Conclusion: High jumpers should improve the velocity of their run-ups, the power of their lower limbs, and the transfer of horizontal motion to vertical motion in the takeoff phase.</p> <p> </p>" @default.
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- W4220956867 date "2022-03-01" @default.
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- W4220956867 title "不同週訓練次數的北歐式健走對高齡者步態特性之影響" @default.
- W4220956867 doi "https://doi.org/10.53106/240996512022030901004" @default.
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