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. 2019 Feb 12;7(3):e14002. doi: 10.14814/phy2.14002

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© 2019 The Authors. Physiological Reports published by Wiley Periodicals, Inc. on behalf of The Physiological Society and the American Physiological Society.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Estimated oxygen consumption at $\overset{\cdot}{V}$ O_2max. Grey area shows $\overset{\cdot}{V}$ O₂ at rest, the black area shows the $\overset{\cdot}{V}$ O₂ of the respiratory muscles, and the white area shows other tissues. NN, normobaric normoxia; HN, hypobaric normoxia. *P < 0.05 versus NN.