Originally Posted by
GlennR
Air entering through the nose is filters and moistened by the nasal cavity.
Ever ride in 30* weather, if you breath through your mouth you'll have a VERY sore throat. But if you breath through your nose, you'll be fine.
Or maybe you're a dolphin and have a "blow hole".
No idea if it causes throat problems, but it's quite plausible. Air coming through the nose is filtered and moistened,, and the nose adds nitric oxide. There's tons of reasons why nose breathing should be preferred:
https://www.washingtonpost.com/lifes...131_story.html
Yes, all air goes through the throat regardless, but the air coming through the nose is different chemically and in volume from air brought in from the mouth.
My nose often runs like crazy when I ride, especially in the cold. I don't get a sore throat but do sometimes find myself hacking a little bit for an hour or two after a ride.