非线性心率变化对炼时间敏感,但不表明急性性能下降
Oluwatimilehin O Ajayi1, Cody R van Rassel1, Matt J Jordan1
1Faculty of Kinesiology, University of Calgary, Calgary, AB, T2N 1N4, Canada.
European journal of applied physiology
|June 20, 2025
概括
短期缩放指数α1 (DFA α1) 随着运动持续时间的延长而下降,并且可以重复,但与训练负载无关. 需要进一步的研究来完善DFAα1在运动生理学中的应用.
科学领域:
- 运动生理学 运动生理学
- 心率变化分析心率变化分析
- 自主神经系统功能 自主神经系统功能
背景情况:
- 确定波动分析短期缩放指数α1 (DFA α1) 量化了心率变化中的自我相似性.
- 在增量运动期间研究了DFA α1,但其与训练负载的关系不太清楚.
研究的目的:
- 调查运动持续时间对DFA的影响.
- 检查DFA α1与内部训练负载指标之间的关系.
- 评估DFA α1测量的可重复性.
主要方法:
- 参与者完成了20分钟 (CWR20) 和40分钟 (CWR40) 持续时间的基线测试和恒定工作速率测试 (CWR).
- 在运动期间和固定中等强度 (MOD) 在CWR和时间到任务失败 (TTF) 试验之前和之后测量了DFA α1.
- 评估了内部训练负载和急性性能下降.
主要成果:
- 在CWR40期间,DFA α1显著下降,在CWR40之后,与CWR20相比,DFA α1在CWR40期间显著下降,在CWR20后更低.
- 在MOD期间测量的DFAα1在CWR持续时间后显著下降,在CWR40后下降更大.
- 虽然CWR40诱导了更大的性能下降和训练负载,但这些指标与DFA α1.1.不相关. DFA α1表现出良好的重复性.
结论:
- 当在任务中或在任务附近测量时,DFA α1对炼时间敏感.
- DFA α1与内部培训负载的个体差异无关,这表明需要方法的改进.
- 在运动科学中,DFA α1显示出作为可重复的生理标记物的潜力.
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