慢性炼训练和急性炼对心率波动的功率谱分析的影响
Robert F Bentley1, Paul Dorian2,3,4,5, Emily Vecchiarelli1
1Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON M5S 2C9, Canada.
概括
定期炼有益于心脏健康,但强度炼可能会改变夜间心率变化 (HRV). 耐力运动员在睡眠期间表现出更多的同情活动,这可能会影响长期健康.
科学领域:
- 心血管生理学心血管生理学
- 运动科学 运动科学
- 自主神经系统功能 自主神经系统功能
背景情况:
- 定期进行中度至强度的体力活动有心脏保护作用,降低死亡率并增加静止心率变化率 (HRV).
- 现有研究对慢性和急性炼对夜间HRV的影响提出了相互矛盾的发现,特别是在超出标准体育活动指南的个体中.
研究的目的:
- 为了比较中年耐力运动员 (EA) 和娱乐活动人士 (REC) 之间的HRV功率谱分析组件.
- 调查EA中强烈耐力运动对HRV的急性影响.
主要方法:
- 119个EA和32个REC接受了24小时的霍尔特监测,以进行基线HRV评估.
- 51 EA在强烈的耐力运动后完成了第二次24小时的霍尔特监测.
- 功率光谱分析量化了每小时的HRV,为早晨,晚上和夜间的平均值.
主要成果:
- 与REC相比,EA表现出显著更高的非常低频 (VLF) 和低频 (LF) HRV组件 (p < 0.001).
- 在EA中,LF/高频率 (HF) 的比率在夜间时间 (0200-0400小时,p = 0.04) 中升高.
- 在运动后的EA中,夜间VLF (p < 0.001) 和HF (p = 0.008) 减少,而LF/HF比率增加 (p = 0.02),表明交感动脉活动增加.
结论:
- 长期耐力训练和急性强度运动似乎都会增加中年耐力运动员的夜间交感动脉活动.
- 这种情况的特点是睡眠期间LF升高和HF成分降低.
- 需要进一步的研究,以阐明夜间HRV降低在这个人群中的机制和长期健康影响.
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