What Researchers Did
Researchers conducted a randomised controlled trial to investigate the effects of real versus sham oxygen administration on high-altitude headache, fatigue, heart rate, and prostaglandin E2 levels at an altitude of 3500 m.
What They Found
Real oxygen significantly increased blood oxygen saturation (SO2) and decreased pre- and post-exercise headache, fatigue, heart rate (HR), and prostaglandin E2 (PGE2). While sham oxygen alone only reduced fatigue, after two previous exposures to oxygen (preconditioning), it decreased post-exercise headache, fatigue, HR, and PGE2, yet without any increase in SO2.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
The study's findings on placebo effects are specific to high-altitude headache and may not generalize to other headache types or settings.