Rapid Change in the Direction of Hand Movement to Increase Hand Propulsion During Front Crawl Swimming
Rapid Change in the Direction of Hand Movement to Increase Hand Propulsion During Front Crawl Swimming
复制标题
自由泳时快速改变手部运动方向以增加手部推进力
DOI：
10.1123/jab.2022-0106
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发表时间：
2023
影响因子：
1.4
通讯作者：
Yasushi Ikuta
中科院分区：
文献类型：
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作者：
Shigetada Kudo;Yuji Matsuda;Yoshihisa Sakurai;Yasushi Ikuta
本研究旨在探讨快速与慢速两组游泳选手在爬泳时手部动作方向与推进力快速变化所引起手部加速度的差异。22名参与者，包括11个快速和11个缓慢的游泳者，进行前爬泳在他们的最大努力。使用运动捕捉系统测量手部加速度、速度和迎角。动态压力的方法被用来估计手推进。在内扫阶段，快组在横向和垂直方向上获得的手加速度显著高于慢组（15.31 [3.44] m·s-2vs 12.23 [2.60] m·s-2和14.37 [1.70] m·s-2vs 12.15 [1.21] m·s-2），快速组的手推进力显著大于慢速组（53 [5] N vs 44 [7] N）。虽然快速组在内扫阶段获得了较大的手加速度和推进力，但两组的手速度和迎角没有显著差异。在水下划水技术中，可以考虑手运动方向的快速变化，特别是在垂直方向上，以增加前爬泳时的手推进力。
This study aims to investigate the difference in hand acceleration induced by rapid changes in hand movement directions and propulsion between fast and slow groups of swimmers during front crawl swimming. Twenty-two participants, consisting of 11 fast and 11 slow swimmers, performed front crawl swimming at their maximal effort. Hand acceleration and velocity and the angle of attack were measured using a motion capture system. The dynamic pressure approach was used to estimate hand propulsion. In the insweep phase, the fast group attained significantly higher hand acceleration than the slow group in the lateral and vertical directions (15.31 [3.44] m·s−2vs 12.23 [2.60] m·s−2and 14.37 [1.70] m·s−2vs 12.15 [1.21] m·s−2), and the fast group exerted significantly larger hand propulsion than the slow group (53 [5] N vs 44 [7] N). Although the fast group attained large hand acceleration and propulsion during the insweep phase, the hand velocity and the angle of attack were not significantly different in the 2 groups. The rapid change in hand movement direction could be considered in the technique of underwater arm stroke, particularly in the vertical direction, to increase hand propulsion during front crawl swimming.