"We know that the more you breath through your nose, the more that it's going to open... [P]eople who are habitual mouth breathers, who are also joggers... start breathing through the nose. In the beginning it's really... hard... then weeks... months go by and their noses open up... [T]he benefits... they're innumerable... not only oxygen, but it helps defend your body, humidifies... conditions air [etc.]"