Deep breathing, over breathing is a root cause of asthma. People are so caught up in the notion of oxygen consumption for good health, it seems “logical” that they breath more deeply. But that is not the case. Dr. Buteyko observed that more shallow breathing and even holding your breath exhaled which encourages more carbon dioxide in the lungs actually helps.
The logic, Dr. Buteyko theorizes is that human lungs make the effort of converting a lot of the air we breath in into carbon monoxide before actual absorption. He thinks that at one point in the past before humans evolved, the earth’s atmosphere had more carbon dioxide. Thus the lung adaptation of creating more carbon dioxide before actual absorption into the bloodstream.
You can experiment yourself and see that you easily make yourself dizzy silly if you try to breath more deeply and more often. But if you breath more shallowly, you are fine.
Here is a short video to be introduced to what the Buteyko Method is.