<unk> , or deep<unk>  is the act of<unk>  deep into your lungs by flexing your diaphragm rather than<unk>  shallowly by flexing your rib cage.
This deep<unk>  is marked by expansion of the stomach (abdomen) rather than the chest when<unk> . It is generally considered a healthier and fuller way to ingest oxygen, and is often used as a therapy for hyperventilation and anxiety disorders.
Performing<unk>  can be therapeutic, and with enough practice, can become your standard way of<unk> .
To breathe<unk> ally, or with the diaphragm, one must draw air into the lungs in a way which will expand the stomach and not the chest. It is best to perform these breaths as long, slow intakes of air - allowing the body to absorb all of the inhaled oxygen while simultaneously relaxing the breather. To do this comfortably, it is often best to loosen tight-fitting pants/belts/skirts as these can interfere with the body's ability to intake air.
While at first one may not feel comfortable not expanding the chest during<unk> ,<unk>  actually fills up the majority of the lungs with oxygen, much more than chest-breathing or shallow<unk> .
Diaphragmatic breathing
Reduced respiratory displacement
Vocal resonation
Poop Breath
Cough reflex
Hypnic jerk
Concussion
Agonal respiration