Nasal breathing is a good way to moderate activity and stay focused on the breath and not push beyond your own endurance level. It will also dilate your blood vessels and lower your blood pressure and decrease your heart rate. It is a little known fact that our nasal passages generate nitric oxide which is a vascular dilater. Simply by breathing through our noses we "sip" this beneficial gas into our bloodstreams. So as you move through your day you can help yourself to better health just by breathing through your nose!