The effects of microgravity exposure on maximal oxygen consumption in humans

Autores/as

Palabras clave:

microgravity, exercise, cardiovascular oxygen transport, muscle atrophy, models.

Resumen

After a short summary of the multifactorial models of maximal O2 consumption (VO2max) limitation, microgravity exposure is discussed as a convenient experimental condition to test these models. The following points are highlighted: 1) The decrease of (VO2max) in microgravity concerns specifically exercise performed in upright posture upon resumption of gravity exposure; 2) The decrease of (VO2max) after microgravity exposure has two components: one is fast and is related to cardiovascular adaptation, the other is slow and is related to the development of muscle atrophy; 3) (VO2max) does not decrease during microgravity or in supine posture upon resumption of gravity exposure, if the time in microgravity is sufficiently short; 4) cardiovascular oxygen transport accounts for 70% of (VO2max) limitation also after microgravity exposure.

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Biografía del autor/a

Guido Ferretti, Université de Genève

Department of Anesthesiology, Pharmacology and Intensive Care, University of Geneva, Switzerland, and Department of Molecular and Translational Medicine, University of Brescia, Italy

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Publicado

2019-09-18

Cómo citar

1.
Ferretti G. The effects of microgravity exposure on maximal oxygen consumption in humans. Rev Cubana Inv Bioméd [Internet]. 18 de septiembre de 2019 [citado 2 de agosto de 2025];38(3). Disponible en: https://revibiomedica.sld.cu/index.php/ibi/article/view/271

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Sección

COMUNICACIÓN BREVE