According to Osho, deep breathing shifts the body’s oxygen–carbon dioxide ratio, and that biochemical shift reverberates through the entire system—altering brain activity, the blood, the nervous system, and by extension the heart. Because our existence rests on a delicate O2/CO2 balance, changing it with breath initiates widespread physiological changes; the specifics are technical, but the mechanism is this ratio’s rebalancing.
Deep breathing changes the mix of gases in your body, which makes your brain, blood, nerves—and therefore your heart—work differently.