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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 skeletal muscle oxygenation during 30 min of endurance exercise at the same relative exercise intensity (70%HRmax) under normoxia (760 mmHg) and hypoxia (526 mmHg, simulated 3000 m). (A) oxhb, (B) dxhb, (C) tohb, (D) StO₂. HRmax: maximal heart rate; oxhb: oxygenated hemoglobin; dxhb: deoxygenated hemoglobin; tohb: total hemoglobin; StO₂: tissue oxygenated saturation. The bars indicate the mean ± S.D. *: Significant difference within the environmental condition (normoxia vs. hypoxia) during 30 min of the endurance exercise.