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. 2022 Oct 15;12(10):975. doi: 10.3390/metabo12100975

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Changes in metabolic function during 30 min of the endurance exercise at the same HR level (136.5 ± 1.5 bpm) under normoxia (760 mmHg) and hypoxia (526 mmHg, simulated 3000 m). (A) SpO₂, (B) VE, (C) VO₂, (D) VCO₂, (E) RER, (F) O₂ pulse. HRmax: maximal heart rate; SpO₂: saturation of percutaneous oxygen; VE: minute ventilation; VO₂: oxygen uptake; VCO₂: carbon dioxide excretion; RER: respiratory exchange ratio, O₂pulse: oxygen pulse. The bars indicate the mean ± S.D. *: Significant difference within the environmental condition (normoxia vs. hypoxia) during 30 min of the endurance exercise.