Nasal breathing during sleep can offset sleep apnea and snoring due to increased resistance and reduced tendency to snore.

“One of the more common methods nowadays that's being used to treat sleep apnea, which is purely behavioral, an intervention, and is essentially zero cost, is that people are starting to shift deliberately to nasal breathing during sleep because of the additional resistance of nasal breathing and because of the fact that there's far less tendency if any, excuse me, to snore when nasal breathing.”

“That's an important point, that when you shift from mouth to nasal breathing during sleep, you're actually learning and training your system to breathe properly. And when I say learning and training your system to breathe properly, what do I mean?”

“And, again, later, we'll get into the enormous benefits of shifting to pure nasal breathing when not exercising hard, meaning at a rate that you could normally hold a conversation-- although if you're pure nasal breathing, you won't be holding that conversation-- or when simply doing work or any number of things that are of low intensity. You can train your system to become a better nasal breather during the daytime through these deliberate actions of taping the mouth shut or just being conscious of keeping your mouth shut. And that, in addition to having a number of positive health and aesthetic effects during the daytime, is known to also transfer to nighttime breathing patterns and allow people to become nasal breathers as opposed to mouth breathers during sleep and to snore less and to have less sleep apnea.”

“if I force myself to nasal breathe uh during cardio workouts especially kind of zone two zone three stuff translates to less mouth breathing and snoring and sleep”