How important is correct breathing to singers?
The difficulty in learning how to breathe correctly lies, not in knowing how much breath to take or how to inhale or exhale. It lies in knowing how to obtain a sure control over the important abdominal muscles without the interference of the diaphragm, rib or chest muscles. It is true that the diaphragm plays the most important part in all singing tones, for the strongest and highest, as well as the softest, only a nominal contraction of the abdominal muscles should take place, assisted by a slight sinking of the lower part of the back.