一个坡道与步骤相比 过渡到恒定工作速率 运动减少 稳定状态 氧气摄入量
Gabriele Marinari1, Danilo Iannetta1, Robert John Holash1
1Faculty of Kinesiology, University of Calgary, Calgary, CANADA.
Medicine and science in sports and exercise
|January 5, 2024
概括
与正方波转换相比,从坡道到恒定工作速率 (rCWR) 的转换减少了运动氧气成本和代谢不稳定性. 这种方法最大限度地减少了早期无氧能量依赖,提高了运动效率.
科学领域:
- 运动生理学 运动生理学
- 代谢适应的过程
- 体育科学 运动科学 运动科学
背景情况:
- 运动过渡,特别是方波工作率 (WR) 变化,可以诱导代谢不稳定.
- 了解运动的氧气成本和不同WR过渡类型期间的代谢反应,对于优化训练方案至关重要.
研究的目的:
- 为了比较向恒定WR (rCWR) 过渡与正方形波向恒定WR (CWR) 过渡在高强度运动期间对代谢不稳定性和氧气成本的影响.
- 调查rCWR方法是否可以降低运动的氧气成本 (V ̇O 2 -G) 并改善代谢稳定性.
主要方法:
- 14名参与者完成了一个坡道增量测试,一个21分钟的CWR和一个rCWR到相同的WR.
- 测量包括吸收氧气 (V·O 2),血中乳酸盐度 ([La - ]) 和肌肉氧和度 (SmO 2).
- 分析的重点是稳定状态运动和乳酸动态的最初10分钟的VO2增量 (VO2-G).
主要成果:
- 与CWR条件相比,rCWR过渡导致V·O2和V·O2−G显著降低.
- 在稳定状态前和稳定状态时,血液中乳酸盐度 ([La - ]) 在rCWR期间显著降低.
- 肌肉氧和 (SmO 2 ) 在rCWR期间保持更稳定,而在CWR中显示不稳定.
结论:
- 平方波过渡的最初几分钟对代谢不稳定性和V·O2−G的增加有显著的贡献.
- 通过减少对无氧能源的早期依赖,rCWR方法导致运动的氧气成本降低.
- 从坡道到恒定的WR过渡似乎是一种更具代谢稳定性和更有效的方法来启动高强度运动.
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