What Researchers Did
Researchers conducted two main experiments to see if hyperbaric oxygen (HBO) exposure caused DNA damage and if it affected high-intensity exercise performance.
What They Found
Healthy subjects (n=8) exposed to 100% oxygen at 1.3 atmospheres absolute (ATA) for 50 minutes once a week for two weeks showed no significant change in a marker for DNA oxidative damage. However, when subjects (n=6) performed maximal knee extensor exercise after HBO pre-exposure (100% O2 at 1.3 ATA for 50 minutes), their muscle torque was significantly lower during the first half of the first set of exercises compared to without HBO. Other measures like muscle fatigue, serum lactate, heart rate, and blood pressure were unchanged.
What This Means for Canadian Patients
For Canadian athletes, this study suggests that using hyperbaric oxygen therapy (HBOT) just before high-intensity exercise might actually reduce muscle strength, rather than improve it. Patients undergoing HBOT for Health Canada-recognized medical conditions would not typically use it in this manner for performance enhancement.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
The study involved a very small number of healthy participants (n=8 and n=6), which limits how widely these findings can be applied.