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Please use this identifier to cite or link to this item: http://ir.jwcpe.ac.jp/dspace/handle/123456789/648

Title: 垂直跳動作からみた大学女子競技者の跳躍能力に関するバイオメカニクス的研究
Other Titles: Biomechanical investigation of jumping ability of female collegiate athletes by analyzing their movements during vertical jumps
Authors: 湯田, 淳
亀井, 良和
前川, 剛輝
小野, 恵李奈
広野, 泰子
広川, 真理子
Yuda, Jun
Kamei, Yoshikazu
Maegawa, Taketeru
Ono, Erina
Hirono, Yasuko
Hirokawa, Mariko
ユダ, ジュン
カメイ, ヨシカズ
マエガワ, タケテル
オノ, エリナ
ヒロノ, ヤスコ
ヒロカワ, マリコ
Keywords: vertical jump
two-dimensional motion analysis
ground reaction force
effectiveness index
joint torque
Issue Date: Mar-2012
Abstract: The purpose of this study was to identify the characteristics of jumping abilities of female collegiate athletes by analyzing their movements during vertical jumps. 24 female collegiate athletes performed vertical and squat jumps on the laboratory floor. A high-speed video camera(300 fps)was used to record their movements, and their performance was analyzed using the direct linear transformation(DLT)technique. The ground reaction forces (GRFs) of both legs were determined using a force platform(500 Hz). The GRFs and two-dimensional coordinates of segment endpoints (23 points) were determined to calculate the kinetic, kinematic, and energetic variables. The effectiveness index(EI) of mechanical energy utilization in a vertical jump is computed as follows. EI = Effective Energy / Mechanical Work = MgH_<max> - MgH_<toe-off> / W_<wb> Significant positive relationships were observed among the jumping height of a vertical jump, mechanical work (W_<wb> ; r = 0.833, p < 0.001), and EI(r = 0.560, p < 0.01). On the other hand, the relationship between the jumping height of a vertical jump and the mechanical energy transfer between segments was not very high (T_b ; r = 0.106, ns). Thus, increasing the EI by increasing the mechanical work is an important factor for increasing the jumping height of vertical jumps in female collegiate athletes. Further, when the jumping height of squat jumps and the percentage increase in the jumping height of vertical jumps relative to squat jumps were high, greater vertical GRFs, knee extension, and ankle plantar flexion torques observed during the first half of the leg extension phase. This force exertion in the lower limb by the counter movement of legs and swinging motion of arms is an effective technique for enhancing the performance in vertical jumps.
URI: http://ir.jwcpe.ac.jp/dspace/handle/123456789/648
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