A Practical Estimation Method for Center of Mass Velocity in Swimming Direction During Front-Crawl Swimming
A Practical Estimation Method for Center of Mass Velocity in Swimming Direction During Front-Crawl Swimming
复制标题
一种实用的前泳时游泳方向质心速度估计方法
DOI：
10.1123/jab.2017-0188
复制
发表时间：
2018
影响因子：
1.4
通讯作者：
Kubo Yasuyuki
中科院分区：
文献类型：
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作者：
Matsuda Yuji;Sakurai Yoshihisa;Akashi Keita;Kubo Yasuyuki
游泳运动中质心运动速度在游泳方向上的变化与游泳成绩和效率有关。然而，在游泳过程中很难计算CoM速度。因此，我们的目的是建立一个实用的方法来估计的CoM的速度在游泳方向上的前爬泳与水下相机。10名游泳运动员记录在前爬泳（25米，最大努力）使用的动作捕捉系统，18个水下和9个陆地摄像机。构建了三种CoM速度估计方法（单髋速度，双髋速度，双髋速度与模拟手臂速度校正）。每个模型都根据实际CoM速度进行了验证。游泳方向上单髋速度与实际CoM速度之间的差异明显大于其他2个模型。此外，当使用模拟手臂速度校正双髋速度时，CoM速度估计的准确性增加。该方法允许仅用2个水下相机估计CoM速度，最大差值为0.06 m·s−1。本研究建立了一种新的实用的方法来估计游泳前爬泳时的CoM速度在游泳方向。
Center of mass (CoM) velocity variation in swimming direction is related to swimming performance and efficiency. However, it is difficult to calculate the CoM velocity during swimming. Therefore, we aimed to establish a practical estimation method for the CoM velocity in swimming direction during front crawl swimming with underwater cameras. Ten swimmers were recorded during front crawl swimming (25 m, maximal effort) using a motion capture system with 18 underwater and 9 land cameras. Three CoM velocity estimation methods were constructed (single-hip velocity, both-hips velocity, and both-hips velocity with simulated arm velocity correction). Each model was validated against the actual CoM velocity. The difference between the single-hip velocity and the actual CoM velocity in swimming direction was significantly larger compared with that of the other 2 models. Furthermore, the accuracy of CoM velocity estimation was increased when both-hips velocity was corrected using the simulated arm velocity. The method allowed estimation of the CoM velocity with only 2 underwater cameras with a maximal difference of 0.06 m·s−1. This study established a novel and practical method for the estimation of the CoM velocity in swimming direction during front crawl swimming.