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Oxygen Uptake

Oxygen uptake (not to be confused with VO2 max) is the amount of oxygen taken up during exercise, and is known to reflect overall energy expenditure during exercise.

Research analysis led by Kamal Patel.
All content reviewed by the Examine.com Team. Published: Jul 5, 2013
Last Updated:

Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect oxygen uptake
Grade Level of Evidence
Robust research conducted with repeated double-blind clinical trials
Multiple studies where at least two are double-blind and placebo controlled
Single double-blind study or multiple cohort studies
Uncontrolled or observational studies only
Level of Evidence
? The amount of high quality evidence. The more evidence, the more we can trust the results.
Outcome Magnitude of effect
? The direction and size of the supplement's impact on each outcome. Some supplements can have an increasing effect, others have a decreasing effect, and others have no effect.
Consistency of research results
? Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
grade-c Minor - See study
Appears to be an increase in oxygen uptake with caffeine consumption, may be related to the increase in metabolic rate
grade-c Minor - See study
Limited evidence, but it is in support of an increase in oxygen consumption
grade-c Minor - See study
In persons undergoing high altitude climbing, the reduced risk of AMD is associated with increased functional capacity of blood to carry oxygen.
grade-c Minor - See study
An increase in oxygen uptake has been noted with green tea catechin ingestion
grade-c - - See study
Oxygen uptake during anaerobic cardiovascular exercise does not appear to be modified with BCAA supplementation
grade-c - - See study
No detectable influence on oxygen uptake during exercise
grade-c - - See study
grade-c - - See study
Oxygen uptake during exercise does not appear to be significantly altered
grade-c - - See study
grade-c - Moderate See 2 studies
A minor increase in oxygen uptake was noted in selective testing (final sprint of one, but not both, betaine conditions) which did not manifest over the whole study period and is likely practically insignificant.
grade-d - - See study
In otherwise healthy athletes given 4.5g of garlic cloves daily before a performance test, the lack of increased performance is met by a lack of changes in oxygen uptake.