Track is comming up in march and I need to get in shape. I have asthma which makes everything 10 times harder than it already is. I tried running outside today and could only do 3 blocks. It was about 45 degress outside too. The air is just so hard on my lungs that I have to stop. When I got home, I did an hour on the bike which was fine. I'm just wondering what I should do to get my lungs in shape for track.