Comment by tapia

I am (was) one of those people (allergies and slightly deviated septum). I started to really breath through my nose about two years ago. I always thought that it would not be possible, because I felt that I could not get enough air. I started practicing while cycling to work everyday. At the beginning it really felt super hard (especially since I have to ride up the hill, about 200m altitude difference), but after a few days of this, it was not hard anymore and I started to breath exclusively through my nose without problems. I think that allergies, although still present, are less intense and it doesn't impair me to breath properly. So, just try.