That absolutely does not work for me when I try to exercise in cold weather. Fast breathing thru my nose in really cold air turns my head into a congealed bloc

That absolutely does not work for me when I try to exercise in cold weather. Fast breathing thru my nose in really cold air turns my head into a congealed block of cement within about ten minutes, with zero air flow, and with all that now less-hydrated snot dripping down the back of my throat makes me gag, sometimes violently. Once that is happening, I have to stop exercising and recover for maybe another 15 minutes. I can exercise much longer if I simply deal with the negatives of mouth breathing. I probably have poor quality sinuses, but I don't think my experience is all that unique either. I should add that I do nose breathe when exercising in warm weather, and that works fine.