i would say its a good thing.
It gives your body oxygen and is really benifical.
Deep breathing is a simple step on the path to a healthy life
Breathing deeply is a simple, effective addition to a healthy lifestyle. Chronic stress leads to quick, shallow breathing which then becomes a habit. Bringing conscious attention to our breath, lengthening and deepening the drawing in of oxygen, nourishes every cell of our body and promotes relaxation. Prolonged exhalation helps get rid of stale air and toxins in our lungs.