Such breathing may be seen in various abnormal conditions; such as, cerebrovascular accident, spinal cord injury, and coma.
Singers practice this method so they can enhance their vocal performances.2. Breathing which is supplemented by abdominal wall muscles that compress the contents of the abdomen and indirectly raise the diaphragm.
This kind of deep breathing is shown by the expansion of the abdomen rather than the chest when breathing.
It is generally considered a healthier and fuller way to ingest oxygen, and it is often used as a therapy for hyperventilation, anxiety disorders and stuttering.