Why the study?
Does breathing normoxic helium or an oxygen-enriched mixture improve respiratory functions and maximal oxygen uptake during graded maximal aerobic exercise compared to atmospheric air in well-trained and untrained individuals?
Population
25 individuals, comprising well-trained (n=11) and untrained (n=14) subjects
Comparison
Breathing normoxic helium and oxygen-enriched… vs Breathing atmospheric air during graded maximal…
Design
Other
Authors
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Should not alter clinical exercise testing protocols; leaves open performance effects of helium by training status.
Does breathing normoxic helium or an oxygen-enriched mixture improve respiratory functions and maximal oxygen uptake during graded maximal aerobic exercise compared to atmospheric air in well-trained and untrained individuals?
Arterial O2 desaturation secondary to a relative hypoventilatory response may limit VO2max and aerobic performance capacity at high work levels, which can be modified by altering inspired gas mixtures.
Inbar et al. (1993) studied this question.
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