I’ve been working on breathing through my nose more over the last few weeks. One area where I’m noticing improvement is better sleep. When I used to breathe through my mouth I would dry out my mouth severely multiple times during the night. This possibly reduced sleep quality because I would roll over to drink a glass of water whenever the dryness got uncomfortable. Maybe it was increasing dehydration, too.

I resisted breathing through my nose because my left nostril seems slightly deviated. Forcing myself to breathe through my nose while I jog or do yoga seems to help. My hunch is that the nostril is just closed up a bit from lack of use.