Functional breathing involves breathing in and out through the nose. The breath is light, regular, effortless with the primary movement from the diaphragm. Breathing patterns have a profound impact on health. Poor breathing patterns literally cause the airways to narrow, and blood circulation and oxygen delivery to be reduced. By increasing the volume of air in through the mouth, you effectively are on the the path to creating poor breathing patterns. Breathing was designed to be done in and out throughout the nose. To experience the powerful effects of Buteyko breathing, view Patrick McKeown’s Tedx talk.