Cold Frontin'

It's not too cold to exercise. This isn't a surprise to me, a veteran of running through several Cleveland winters. Unless you have certain forms of asthma, cold air doesn't damage your lungs--indeed, it isn't cold air that hurts, anyway, but dry air--despite what hundreds--literally--of people have told me over the years. Trust me, if cold air damaged your lungs, that 20-miler in the blizzard back in 2001 would have killed me. (The NPS would have found my body after the snow melted, I guess.)