Quote Originally Posted by OakLeaf View Post

Did you know that your sinuses produce lots of nitric oxide, which when you inhale it, enhances oxygen uptake and acts as a vasodilator? I've also been looking for some of those nasal strips, but I guess they're out of fashion, because I can't find any, any more. I know they always did help my breathing.
I had read that--interesting. And when you think about it, breathing through your nose rather than your mouth just generally makes physiological sense even aside from the nitric oxide--the nose filters "stuff" out of the air whereas the mouth doesn't. Today's run didn't go as well as yesterday's, but I think it was because I ran a section of trail that I haven't done in a while that is harder than what I've been doing lately and because of the temperature (85 degrees, up from mostly the 60s lately).