Faculty of Sport Sciences, Universidad de Extremadura, 10003 Caceres, Spain.
Department of Physical Education and Sport, Faculty of Sport Sciences, Universidad de Granada, 18011 Granada, Spain.
Int J Environ Res Public Health. 2022 Mar 14;19(6):3436. doi: 10.3390/ijerph19063436.
Hypobaric hypoxia (HH) seems to lead to different responses compared to normobaric hypoxia (NH) during physical conditioning. The aim of the study was to analyze the hormonal and circulating ion responses after performing high-intensity resistance training with different inter-set rest under HH and NH condition. Sixteen male volunteers were randomly divided into two training groups. Each group completed two counterbalanced resistance training sessions (three sets × ten repetitions, remaining two repetitions in reserve), with both one- and two-minute inter-set rest, under HH and NH. Blood samples were obtained to determine hormones and circulating ions (Ca, Pi, and HCO) at baseline and after training sessions (5, 10, and 30 min). Resistance training with one-minute rest caused greater hormonal stress than with two-minute rest in cortisol and growth hormone, although the hypoxic environmental condition did not cause any significant alterations in these hormones. The short inter-set rest also caused greater alterations in HCO and Pi than the longer rest. Additionally, higher levels of Ca and Pi, and lower levels of HCO, were observed after training in HH compared to NH. Metabolic and physiological responses after resistance training are mediated by inter-set rest intervals and hypoxic environmental condition. According to the alterations observed in the circulating ions, HH could cause greater muscular fatigue and metabolic stress than NH.
低压缺氧（HH）似乎与常压低氧（NH）相比，在身体适应期间会产生不同的反应。本研究的目的是分析在 HH 和 NH 条件下进行高强度抗阻训练时，不同组间休息对激素和循环离子反应的影响。16 名男性志愿者被随机分为两组。每组完成两次抗阻训练，每组 3 组×10 次重复，剩余 2 次为储备重复，组间休息时间分别为 1 分钟和 2 分钟。在训练前和训练后（5、10 和 30 分钟）采集血样，以确定激素和循环离子（Ca、Pi 和 HCO）的水平。与 2 分钟组间休息相比，1 分钟组间休息会导致更大的激素应激，包括皮质醇和生长激素，尽管缺氧环境条件不会导致这些激素发生任何显著变化。HCO 和 Pi 的变化也比较长的组间休息更大。此外，与 NH 相比，HH 组在训练后观察到更高的 Ca 和 Pi 水平，以及更低的 HCO 水平。抗阻训练后的代谢和生理反应受组间休息间隔和缺氧环境条件的影响。根据循环离子的变化，HH 可能比 NH 引起更大的肌肉疲劳和代谢应激。
