The Oxygen Advantage: The Simple, Scientifically Proven Breathing Techniques for a Healthier, Slimmer, Faster, and Fitter You

by Patrick McKeown

Below is a brief list of the functions of nasal breathing: • Nose breathing imposes approximately 50 percent more resistance to the airstream in normal individuals than does mouth breathing, resulting in 10 to 20 percent more O2 uptake.