So... how cold is too cold? At what point do the dangers outweigh the benefits?
Supposed to do speed/hill work...
If you have the proper cold weather running gear, I would say that it is not "too cold" until at least -20F true temp. I live in MI and ran Tuesday morning in -2F (wind chill: -20F). I wore an Under Armour shirt, hooded sweatshirt, and clima-cool Adidas jacket on top with tights on bottom. I also wore two pairs of gloves and a ninja-looking Under Armour mask. I was sweaty by the 2nd mile.
Precious Roy wrote:
If you are on a trail and have an injury, you won't be able to stay warm if you have to limp home and can get in serious trouble.