对超大极点跑步炼的生理反应,与最后的呼吸呼吸保持到突破点
Xavier Woorons1, Frédéric Daussin1, Adrien Combes1
1URePSSS-Unité de Recherche Pluridisciplinaire Sport Santé Société, Université de Lille, Université d'Artois, Université du Littoral Côte d'Opale, Lille, France.
Journal of human kinetics
|February 21, 2024
概括
与无限制呼吸 (URB) 相比,进行强烈的跑步并保持呼吸 (EEBH) 显著降低血液,大脑和肌肉中的氧气水平. 这导致区域血液体积增加,表明补偿性血管扩张.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 人体生理学 人体生理学
背景情况:
- 重复的超大极限跑步炼挑战了生理系统.
- 末尾呼气喘息 (EEBH) 是一种极端情况,影响气体交换和氧化.
- 了解强度运动期间EEBH的生理影响对于性能和安全至关重要.
研究的目的:
- 评估在与EBH.重复运行时的生理反应.
- 为了比较EBH和无限制呼吸 (URB) 条件之间的氧化和血液动力学变化.
- 为了研究在强度运动期间与呼吸保持的补偿机制.
主要方法:
- 八名男性跑步者在跑步机上重复进行了最高最大的跑步 (125%的最大有氧速度).
- 测试了两个条件:最大EEBH和URB.
- 测量了大脑和肌肉的氧化 (Δ[Hbdiff),总血红蛋白 (Δ[THb]),肌肉的氧化,潮尾气体 (PETO2,PETCO2),动脉氧和 (SpO2) 和心率 (HR).
主要成果:
- 与URB (SpO295.7%) 相比,EBH发作导致SPO2 (nadir 74.9%) 和HR显著降低 (SpO295.7%).
- 大脑和肌肉的氧化 (Δ[Hbdiff]) 被减少了EEBH.
- EEBH诱导了较高的脑和肌肉Δ[THb]和较大的肌肉氧化,表明区域血液体积增加.
结论:
- 经过EBH重复的超大极限运行显著降低了动脉,大脑和肌肉的氧化.
- 区域血液体积增加,可能是由于血管扩张,在EEBH期间发生,以保持氧气供应.
- 这些发现凸显了强烈运动与自愿屏住呼吸相结合的深刻生理压力.
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