2019, Number 3
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Rev Cubana Invest Bioméd 2019; 38 (3)
The effects of microgravity exposure on maximal oxygen consumption in humans
Ferretti G
Language: English
References: 10
Page: 1-10
PDF size: 345.85 Kb.
ABSTRACT
After a short summary of the multifactorial models of maximal O
2 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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