Three-dimensional lower-limb kinematics during undulatory underwater swimming
Three-dimensional lower-limb kinematics during undulatory underwater swimming
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DOI：
10.1080/14763141.2021.1995475
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发表时间：
2021-11-18
影响因子：
2.2
通讯作者：
Yasuo, Sengoku
中科院分区：
文献类型：
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作者：
Matsuda, Yuji;Kaneko, Masaki;Yasuo, Sengoku
在不同的运动过程中，评估了肢体关节的三维(3D)运动。然而，有关波浪式水下游泳(UUS)过程中三维肢体关节运动的研究报道甚少。本研究旨在探讨UUS最大速度时三维肢体运动学与前向游泳速度的关系。在UUS期间，共有26名国际和国家级男子游泳运动员使用动作捕捉系统进行了评估。计算各关节的三维角和角速度，通过相关分析研究前向游泳速度、角速度和角速度之间的关系。髋关节内、外旋转峰值速度与前向游泳速度呈显著正相关(r=0.48，p=0.01和r=-0.74，p<；0.01)。髋关节内旋峰值出现在下踢中间(25%踢腿周期，243度/S)，外旋峰值出现在下踢末端(50%踢腿周期，-351度/S)。游泳运动员髋关节内外旋转角速度峰值较高，髋关节旋转活动范围较大。游泳运动员三维移动他们的下肢关节，除了屈曲/伸展运动和髋关节旋转外，还可以提高UUS的熟练程度。
The three-dimensional (3D) motion of lower-limb joints is evaluated during various sports. However, few studies have reported the 3D lower-limb joint movement during undulatory underwater swimming (UUS). This study aimed to investigate the relationship between 3D lower-limb kinematics and forward-swimming velocity during UUS at maximal velocity. A total of 26 male international- and national-level swimmers were assessed during UUS using a motion-capture system. The 3D angle and angular velocity of the lower-limb joints were calculated and relationships between forward-swimming velocity, angle, and angular velocity were investigated using correlation analysis. The peak angular velocities of hip internal and external rotation were significantly correlated with forward-swimming velocity (r = .48, p = .01 and r = -.74, p < .01, respectively). Peak hip internal rotation was observed at the middle of down-kicking (25% kick cycle, 243 degrees/s), whereas peak external rotation was observed at the terminal of down-kicking (50% kick cycle, -351 degrees/s). The swimmers showed a higher peak angular velocity of hip internal/external rotation with a large active range of motion for hip rotation. The swimmers moved their lower-limb joints three-dimensionally, and aside from flexion/extension movements, and hip rotation may increase UUS proficiency.