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在前爬行中解释预测的前额面积:确定每个身体部分的预测前额面积
Sohei Washino1, Akihiko Murai1, Tomoya Kadi
1Human Augmentation Research Center, National Institute of Advanced Industrial Science and Technology, Kashiwa, Chiba, JAPAN.
Medicine and science in sports and exercise
|October 1, 2024
概括
计算游泳段的预测正面面积 (PFA) 需要包括水平速度. 忽视速度高估了上肢对前爬行中的压力阻力贡献.
科学领域:
- 游泳的生物力学
- 体育运动中的流体动力学
- 人类运动分析分析
背景情况:
- 预测前额面积 (PFA) 对于估计游泳阻力至关重要.
- 以前的方法可能无法完全解释动态的身体部分运动.
- 精确的拖动计算对于性能优化至关重要.
研究的目的:
- 开发和验证一种方法来计算前爬行中个体体段的PFA.
- 为了比较压力阻力计算,并没有考虑水平速度.
- 在前爬行生物力学中提供解释PFA的证据.
主要方法:
- 从竞技游泳者的3D身体扫描中开发出数字人体模型.
- 使用逆动力学和水下运动捕捉重建了3D游泳运动.
- 在静态 (仅PFA) 和动态 (PFA + 水平速度) 条件下,计算了八个车身段的PFA,并比较了压力阻力指数.
主要成果:
- 压力阻抗指数在静态条件下与动态条件相比,在手臂,肘部和手部的压力阻抗指数显著更高 (P < 0.001).
- 这表明PFA单独高估了这些细分市场对压力阻力的贡献.
结论:
- 上肢部分的预测前面面积高估了它们在前部爬行时对压力阻力的影响,当不考虑水平速度时.
- 将水平速度纳入PFA的动态计算,可以更准确地评估游泳中的压力阻力.
- 这种方法提高了对前爬的生物力学力量的理解.
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