著者

戸邉 直人 苅山 靖 林 陵平 木越 清信 尾縣 貢

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

pp.18044, (Released:2019-10-28)

参考文献数

42

被引用文献数

1

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In the take-off motion of the high jump, huge power exerted by the lower limb is required in a very short time. Consequently, to achieve the take-off motion, improvement of power exertion ability is important, and most high jumpers work to achieve this. However, the components of the kinetics that contribute to high jump performance are unknown. This study investigated lower limb joint kinetics during the take-off phase of the high jump and the relationships between kinetic variables and performance. Seven male high jumpers were investigated. Their take-off motions were filmed using an infrared camera (Vicon Motion System, 250 Hz), and the ground reaction force was recorded using a force platform (Kistler, 9287C, 1000Hz). The coefficients of correlation between the vertical velocity of the center of gravity of the whole body (CG) at the moment of take-off and kinetic variables were calculated. The following results were obtained: 1. The muscles involved in hip extension play a primary role in shock absorption at the moment of touchdown. Furthermore, the muscles involved in hip abduction, knee extension and ankle plantarflexion play a significant role in lifting the body in addition to the above functions. 2. The concentric power produced by hip abductors during the take-off motion may increase vertical velocity of the CG at the moment of take-off. 3. As it has been reported that single leg exercises impact the function of hip abductors, such exercises may improve take-off motion in the high jump. These results illustrate the characteristics of take-off motion in the high jump, and these may be studied further to plan effective training aimed at improving performance.

著者

戸邉 直人 林 陵平 苅山 靖 木越 清信 尾縣 貢

出版者

日本コーチング学会

雑誌

コーチング学研究 (ISSN:21851646)

巻号頁・発行日

vol.31, no.2, pp.239-251, 2018-03-20 (Released:2019-09-02)

参考文献数

28

被引用文献数

7

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This study aimed to present the practical knowledge and investigate effective techniques to improve performance in the high jump. The subject was a male Japanese top class high jumper whose personal record was 2 m31. Progress in high jump performance was shown by an increase from 2 m22 in 2012 to 2 m31 in 2014, and kinematics data were collected at competitions to assess the factors involved in achieving best record. The results were as follows. 1. The subject focused on high jump technique training during periods between competitions, and on improvement in strength training at without competition periods. Considering effects of training, this training protocol was logical. 2. The subject changed from single-arm action at takeoff to double-arm action and improved its techniques during this study. This change improved high jump performance by increasing force on takeoff. 3. The results of this study suggested different from general theory which is provided by previous study. It means that there is possibility to discover new theory by investigating individual case.     These results suggest the hints to improve high jump performance and indicating the importance of individual longitudinal investigation.