尽管增加了运动后血体积膨胀,但在持续时间翻倍时,对急性高强度运动的红素反应没有差异
Thomas R Tripp1, Allison M Caswell2, Brittany Edgett3
1University of Calgary, Faculty of Kinesiology, Calgary, Alberta, Canada; thomas.tripp@ucalgary.ca.
概括
高强度间歇运动持续时间会影响血体积膨胀,但不会影响红素水平. 较长的运动持续时间会导致更大的血体积增加,这表明持续时间是超高血的关键,不一定是红细胞形成.
科学领域:
- 运动生理学 运动生理学
- 内分泌学 在内分泌学.
- 体育科学 运动科学 运动科学
背景情况:
- 运动后的血体积膨胀是一个潜在的红细胞生成信号.
- 运动处方变量对这种机制的影响还不太清楚.
- 红细胞的生成,即红细胞的产生,对于氧气运输至关重要.
研究的目的:
- 为了研究高强度间歇运动 (HIIT) 持续时间对红色素体信号传递的影响.
- 为了确定HIIT持续时间对血体积膨胀的影响.
- 探索运动持续时间,血体积和荷尔蒙反应之间的关系.
主要方法:
- 16名健康参与者 (8名男性,8名女性) 执行了两个HIIT协议:四次间隔 (4×4 HIIT) 和八次间隔 (8×4 HIIT).
- 每个间隔在105%的临界功率下4分钟,恢复3分钟.
- 运动前,运动后立即和运动后24小时收集血液样本,以测量血红蛋白,血红素和荷尔蒙度 (素,阿尔多素).
主要成果:
- 红素水平在HIIT后24小时增加,在4x4和8x4协议之间没有显著差异.
- 在两种方案后,血体积立即下降,但在运动后24小时内仅在8x4方案后显著增加.
- 运动后的阿尔多激素度显著增加,在8x4协议后,与4x4协议相比,观察到更大的增加.
结论:
- 运动后的高血似乎取决于运动的持续时间,更长的持续时间会导致更大的血体积膨胀.
- 血体积增加并不是HIIT后循环红素水平升高的先决条件.
- 这些发现挑战了运动诱导的高血压对耐力训练适应与血红蛋白质量和氧气承载能力相关的已确定的重要性.
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