在男性和女性中,在休息时的外周超性化学敏感性和渐进的运动强度
Madeline D Wright1, Leah M Mann1, Connor J Doherty1
1Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, Ontario, Canada.
Journal of applied physiology (Bethesda, Md. : 1985)
|December 21, 2023
概括
运动增加了外周超性化学敏感性 (PHC),这是身体对高二氧化碳水平的反应. 这项研究发现,即使是没有负载的骑自行车也能提高PHC,但更高的运动强度并不能进一步增强这种反应.
科学领域:
- 运动生理学 运动生理学
- 呼吸系统控制 呼吸系统控制
- 心血管监管 监管心血管系统
背景情况:
- 周围超的化学敏感性 (PHC) 对于在超期间调节呼吸至关重要.
- 急性全身炼可以增强PHC,但炼强度的潜在机制和影响尚不清楚.
研究的目的:
- 研究不同强度的运动对PHC的影响.
- 为了确定是否发生PHC的渐进性运动增大.
主要方法:
- 20名健康受试者接受了最大运动测试,以确定峰值功率输出 (Wmax).
- 在另一天,受试者完成了六个12分钟的阶段:坐着休息,骑自行车休息,不加载的骑自行车 (0W),25%,50%和70%的Wmax骑自行车.
- 在每个阶段使用超肌挑战 (10% CO2) 评估PHC.
主要成果:
- 从坐着休息到没有负载的骑自行车,PHC显著增加,Wmax增加25%.
- 在运动强度 (25%,50%和70%Wmax) 之间没有观察到PHC的显著差异.
- 男人表现出比女性更大的外周超呼吸反应 (HCVR),无论运动强度如何.
结论:
- 骑自行车的行为,即使没有负载,也会增加外围超呼吸反应 (HCVR),这表明潜在的前机制.
- 运动强度不会进一步增加外围HCVR超过一定的值.
- 运动诱导的外周HCVR的增加似乎独立于性别,并且可能由中央指令介导.
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