Starting with just walking...

RunnerElizabeth

I'm an asthmatic that likes to run half marathons. I was the girl who wasn't allowed to run the mile in gym class for fear that it would set off an attack and land me in the hospital. Turns out picking up running was the best thing i ever did for my asthma.

it took 2 attempts at c25k over a year and a half before i was able to get from 2 or 3 mins of running to running 5k in 40 mins. I kept getting sick and run down, but once it finally took, my lungs got stronger. I can now run 5k in 26:04, a half marathon in just over 2 hours and i happily do long runs of 10-15 miles every week. And the best part? I was able to stop taking my daily inhaled steroid.

Start with walking, once you can walk 30 mins without stopping 3 times a week, move on to c25k, once you finish that, do a beginner 5k program and see how you progress from there.