Oxygen boost or cut? study tests HIIT with altered air
NCT ID NCT07551869
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looked at how breathing air with more or less oxygen than normal during high-intensity interval training (Tabata) affects fitness. 23 healthy men did 9 sessions over 3 weeks on a bike while breathing either oxygen-rich or oxygen-poor air. Researchers measured changes in aerobic capacity, lactate, and perceived effort to understand how oxygen availability influences exercise adaptations.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- oxygen (hyperoxic or hypoxic air)
- What this could lead to
- If successful, this could help design better exercise programs that use oxygen levels to boost fitness gains.
- What could go wrong
- This is a small, early study with only 23 healthy men, so results may not apply to women or people with health conditions. The training is short (3 weeks), so long-term effects are unknown.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Haute Ecole Bruxelles Brabant - HE2B
Brussels, Brussels Capital, 1040, Belgium
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