Developing a methodology for estimating the drag in front-crawl swimming at various velocities
Developing a methodology for estimating the drag in front-crawl swimming at various velocities
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DOI：
10.1016/j.jbiomech.2017.01.037
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发表时间：
2017-03-21
影响因子：
2.4
通讯作者：
Takagi, Hideki
中科院分区：
文献类型：
--
作者：
Narita, Kenzo;Nakashima, Motomu;Takagi, Hideki
本文旨在发展一种新的方法来评估在不同速度和全行程下的前爬泳阻力。在这项研究中，我们介绍了新方法的基本原理和设备，它估计在游泳阻力的测量值的剩余推力（MRT）。此外，我们应用MRT来评估主动阻力（Da），并将其与相同游泳运动员测量的被动阻力（Dp）进行比较。Da是在流速为1.0至1.4 m s（-1）的五个阶段中估计的; Dp是在流速为0.9至1.5 m s（-1）的情况下以0.1 m s（-1）的间隔测量的。在MRT的Da值的变异性也进行了研究，为两个游泳运动员。结果表明，Da（Da = 32.3 v（3.3），N = 30，R-2 = 0.90）大于Dp（Dp = 23.5 v（2.0），N = 42，R-2 = 0.89），两名游泳运动员Da的变异性分别为6.5%和3.0%。MRT可用于评价各种速度下的Da，其特殊之处在于它可适用于各种游泳风格。因此，使用MRT评估游泳阻力有望在建立游泳基础数据方面发挥作用。(C)2017爱思唯尔有限公司版权所有
We aimed to develop a new method for evaluating the drag in front-crawl swimming at various velocities and at full stroke. In this study, we introduce the basic principle and apparatus for the new method, which estimates the drag in swimming using measured values of residual thrust (MRT). Furthermore, we applied the MRT to evaluate the active drag (Da) and compared it with the passive drag (Dp) measured for the same swimmers. Da was estimated in five-stages for velocities ranging from 1.0 to 1.4 m s(-1); Dp was measured at flow velocities ranging from 0.9 to 1.5 m s(-1) at intervals of 0.1 m s(-1). The variability in the values of Da at MRT was also investigated for two swimmers. According to the results, Da (Da = 32.3 v(3.3), N = 30, R-2 = 0.90) was larger than Dp (Dp = 23.5 v(2.0), N = 42, R-2 = 0.89) and the variability in Da for the two swimmers was 6.5% and 3.0%. MRT can be used to evaluate Da at various velocities and is special in that it can be applied to various swimming styles. Therefore, the evaluation of drag in swimming using MRT is expected to play a role in establishing the fundamental data for swimming. (C) 2017 Elsevier Ltd. All rights reserved.