文章基本信息

标题：助走を用いる片脚跳躍における跳躍競技者の踏切脚の力発揮特性
本地全文：下载
作者：柴田篤志 ; 榎本靖士
期刊名称：体育学研究
印刷版ISSN：0484-6710
电子版ISSN：1881-7718
出版年度：2022
卷号：67
页码：35-48
DOI：10.5432/jjpehss.21057
语种：Japanese
出版社：Japan Society of Physical Education, Health and Sport Sciences
摘要：The purpose of this study was to clarify the kinetic characteristics of the take-off leg during the take-off phase required to effectively change the direction of the center of the mass velocity vector in the running single-leg jump (RSLJ) by comparing the kinetics of jumpers and sprinters. Nine male collegiate jumpers and 9 male collegiate sprinters performed the RSLJ in 2 tasks designed to achieve as much forward and upward motion as possible, respectively, with 4 different run-up speeds. Three-dimensional coordinates of the end positions of the body segments and the ground reaction force were obtained using a motion capture and force platform system. Leg stiffness and the change in direction of the velocity of the center of mass during the second half of the takeoff phase were greater for the jumpers than for the sprinters at the same run-up speed. However, there was no significant difference in the decrease of velocity between the 2 groups. As a result, the jumpers achieved a greater jump height and jump distance. They also exhibited greater knee joint torque in the first half and greater ankle plantar torque in the second half than the sprinters. This ankle plantar flexion torque might prevent excessive forward rotation of the shank segment during the take-off phase. These results suggest that differences in the take-off leg kinetics of jumpers may work to change the direction of the center of mass velocity more effectively.
关键词：助走スピード;地面反力;関節トルク;スティフネス