What Researchers Did
Researchers measured the complex patterns of breathing and heart rate in 18 healthy adults (ages 19-74) during rest and two levels of exercise, both at normal air pressure (1 ATA) and under hyperbaric conditions (2.8 ATA) in a hyperbaric chamber.
What They Found
They found that both breathing and heart rate showed complex, fractal patterns. These patterns became less complex with exercise; for example, breathing's fractal dimension decreased from 1.33 +/- 0.11 at rest to 1.19 +/- 0.16 during heavy exercise at 1 ATA, and heart rate's from 1.19 +/- 0.11 to 1.02 +/- 0.05. Importantly, hyperbaric exposure at 2.8 ATA did not change these patterns, and breathing and heart rate patterns remained independent of each other under all tested conditions.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
The study involved a small number of healthy adults, meaning the findings may not apply to all patient populations or those with underlying health conditions.