A. The answer lies in the rhythm and balance of your breathing. Deep, slow diaphragmatic breathing has a natural 1-to-1 rhythm of inspiration and expiration. However, those of us suffering from chronic stress may be chest-breathing, where the chest is pulled up by the muscles in the neck and at the base of the scull, drawing in relatively little air. In this mode, inspiration and expiration become unbalanced and tempo increases, and we lose our rhythm. Chest-breathing can result in low CO2 levels, causing arterial constriction and reducing hemoglobin’s ability to deliver oxygen to the body tissue. Simply Breathe can help train your breathing back into a natural, healthy rhythm.