Wheezing is the body's defensive response to hyperventilation. If someone breathes too fast, the carbon dioxide level in the lungs drops. By wheezing, the lungs hold on to more carbon dioxide and try to correct the body's pH balance. We have seen over and over again that if you can get someone who is wheezing to slow down their breathing and increase their carbon dioxide, the wheezing goes away.
Wheezing And Buteyko Method