What Researchers Did
Researchers tested whether mild hyperbaric oxygen (1.3 ATA with 38% oxygen) could help rats recover lost muscle mass after two weeks of limb immobilization in a cast.
What They Found
Rats immobilized without HBOT lost about 11.5% of plantaris muscle weight compared to controls (p < 0.01), while rats treated with mild HBOT showed no significant muscle loss. Mitochondrial enzyme activity (measured by succinate dehydrogenase staining) also recovered to normal levels in the HBOT group. The effect was specific to the fast-twitch plantaris muscle; the slower-twitch soleus muscle did not respond the same way.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
This is an animal study in rats and cannot be directly applied to human rehabilitation; the mild pressure protocol (1.3 ATA) also differs from standard clinical HBOT settings.