Effect of arm swing direction on forward and backward jump performance
Effect of arm swing direction on forward and backward jump performance
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DOI：
10.1016/j.jbiomech.2008.07.002
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发表时间：
2008-09-18
影响因子：
2.4
通讯作者：
Fukashiro, Senshi
中科院分区：
文献类型：
--
作者：
Hara, Mikiko;Shibayama, Akira;Fukashiro, Senshi
本研究量化并比较了手臂摆动方向的差异如何影响前跳和后跳过程中的力学和生理参数。7名受试者最大限度地进行了三种类型的前蹲和后蹲跳跃-无手臂摆动（FJ，BJ），前手臂摆动（FJF，BJF）和后手臂摆动（FJB，BJB）从力平台。所有的表演都是用三维运动捕捉系统捕捉的。获得下肢肌肉的肌电图（EMG）。通过结合运动学和动力学数据计算变量。FJF的起跳位移和质心速度显著大于FJ和FJB，BJB的起跳位移和质心速度显著大于BJ和BJF，表明采用相同的摆臂方向作为给定的起跳方向，可以获得最好的成绩。FJF组三个下肢关节和两个上肢关节的总功显著大于FJ或FJB组，BJB组显著大于BJ或BJF组。下肢关节以髋关节作功最大。在FJF和BJB中产生髋功率时股二头肌的积分EMG显著大于其他条件下的积分EMG。这些结果表明，如果手臂摆动方向与给定的跳跃方向相同，则髋伸肌的激活水平更大，以对抗在蹬离阶段期间使髋关节屈曲的大载荷，这导致髋关节伸展扭矩、功率和功增加。(C)2008爱思唯尔有限公司保留所有权利。
This study quantified and compared how the directional differences in arm swing affected mechanical and physiological parameters during forward and backward jumping. Seven Subjects maximally performed three types of forward and backward squat jumps-no arm swing (FJ, BJ), forward arm swing (FJF, BJF), and backward arm swing (FJB, BJB) from a force platform. All performances were captured with a 3-D motion Capture system. Electromyograms (EMGs) of the lower extremity muscles were obtained. Variables were calculated by combining kinematic and kinetic data. The jump displacement and center of mass velocity at take-off were significantly larger in FJF than in FJ or FJB and larger in BJB than in BJ or BJF, Suggesting that the best performance was obtained by employing the same arm Swing direction as a given jump direction. The total Work by three lower and two upper extremity joints was significantly larger in FJF than in FJ or FJB and larger in BJB than in BJ or BJF. For the lower extremity Joints, hip work was the greatest in FJF and BJB. The integrated EMG of the biceps femoris when the hip power was produced was significantly larger in FJF and BJB than under other conditions. These results suggest that if the arm swing direction is the same as a given jump direction, the activation level of the hip extensor is greater to counter large loads which make the hip joint flex during the push-off phase, which result in increased hip extension torque, power, and work. (C) 2008 Elsevier Ltd. All rights reserved.