Forwards-backwards hand velocity induced by the upper trunk rotation in front crawl strokes and its association with the stroke frequency
Forwards-backwards hand velocity induced by the upper trunk rotation in front crawl strokes and its association with the stroke frequency
复制标题
前爬泳中上躯干旋转引起的前后手速度及其与划水频率的关系
DOI：
10.1080/02640414.2021.1892266
复制
发表时间：
2021
影响因子：
3.4
通讯作者：
Sakurai Yoshihisa
中科院分区：
文献类型：
--
作者：
Kudo Shigetada;Mastuda Yuji;Yanai Toshimasa;Sakurai Yoshihisa
本研究的目的是确定上躯干旋转的贡献，包括滚-俯仰-偏航手速度在向前-向后的方向在前爬泳中风，并调查的协会向前-向后的手速度引起的上躯干旋转中风频率。15名技术熟练的游泳运动员与回射标记进行前爬泳在游泳池中的运动捕捉系统设置。在表演过程中，确定了仅由上躯干旋转引起的向前-向后手速度。在拉和推阶段，28%和19%的向后手速度分别由上躯干旋转引起，而在恢复阶段，19%的向前手速度由上躯干旋转引起。上躯干旋转对手的前后速度的贡献与手肘关节一样大，是拉臂阶段手向后速度的第二主要来源。上躯干旋转产生的手的前后运动速度与划水频率相关（r = 0.56，p < 0.05）。由上躯干引起的手的前后速度会影响手的推进力和划水频率，因此游泳运动员和教练员应该考虑这个提高成绩的变量。
The aim of this study was to determine the contribution of the upper trunk rotation consisting of roll-pitch-yaw to hand velocity in the forwards-backwards direction during front crawl strokes and to investigate the association of forwards-backwards hand velocity induced by the upper trunk rotation with stroke frequencies. Fifteen skilled swimmers with retro-reflective markers performed front crawl strokes in a swimming pool where a motion capture system was set. Forwards-backwards hand velocity solely induced by the upper trunk rotation was determined during the performance. In the pull and push phases, 28% and 19% of the backward hand velocity was induced by the upper trunk rotation, respectively, while 19% of the forward hand velocity resulted from the upper trunk rotation in the recovery phase. The upper trunk rotation contributed to the forwards-backwards velocity as much as the elbow joint and was the second primary source of backward hand velocity in the pull phase. The forwards-backwards hand velocity created by the upper trunk rotation was associated with the stroke frequencies (r = 0.56, p < 0.05). The forwards-backwards hand velocity induced by the upper trunk would influence hand propulsion and stroke frequency so that a swimmer and coach should consider this performance-enhancing variable.