Well I started running today for my first time in a while. I have never really been a runner to say. I play hockey 2 times a week so I thought I would try running 2 miles today. It was cold this morning I live in Michigan so I think it was about 30 degrees out. My lungs started to burn after the first hour. I dont know why, if it was becasue of the cold or if I wasnt in shape or both. My legs and everything else was fine, anyways I hope to keep this going and not quit after a week lol.