在稳定状态域内的增量运动平均响应时间的增加:对运动测试和处方的影响
Bridgette G J O'Malley1, Robert A Robergs1, Todd A Astorino2
1Queensland University of Technology, Faculty of Health: School of Exercise and Nutrition Sciences, Brisbane, Australia.
Sports medicine and health science
|September 23, 2024
概括
在运动期间减缓氧气吸收动力学会增加更高强度的平均响应时间. 这表明没有单个增量平均反应时间,与较慢的氧气吸收和在增加的运动水平时更大的氧气缺陷保持一致.
科学领域:
- 运动生理学 运动生理学
- 心血管健康 呼吸系统健康
背景情况:
- 氧气吸收 (V·O2) 动力学反映了心肺呼吸系统适应运动的效率.
- 了解平均反应时间 (MRT) 对于评估运动耐受性和代谢反应至关重要.
研究的目的:
- 为了调查在过渡到更高功率输出 (PO) 期间减缓氧气吸收 (V̇O2) 动力学是否会随着运动强度的增加增加,增加平均响应时间 (MRT).
- 为了确定是否存在单个增量MRT (iMRT) 或是否随着运动强度而变化.
主要方法:
- 十四名训练有素的自行车手在30%,45%,65%和75%的峰值PO时进行了坡道增量自行车测试和6分钟的稳定状态 (SS) 自行车比赛.
- 从SS试验数据计算MRT,使用单指数和线性曲线拟合.
- 增量MRT (iMRT) 通过在机场测试期间将PO转换为时间来量化.
主要成果:
- 斜坡分析揭示了SS和低于气体交换值 (GET) 的增量运动之间的V̇O2反应的显著差异.
- 观察到稳定状态V̇O2 (ssV̇O2) 和iMRT在45%和30%Wpeak之间存在显著差异.
- 具体来说,ssV̇O2在45%Wpeak时比30%Wpeak更高,而iMRT在45%Wpeak时比30%Wpeak更长.
结论:
- 这些发现表明,没有单一的iMRT,因为它随着运动强度而变化.
- 这种变化与缓慢的V·O2动力学和在稳定状态域内的更高运动强度时增加的V·O2赤字相一致.
- 这些结果对了解训练过的个体的运动耐受性和代谢反应有影响.
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