Exercise asthma is a drag. You might be opening up your lungs more than usual during running, and dirty or dry air can be irritating to pockets that aren't use

Exercise asthma is a drag. You might be opening up your lungs more than usual during running, and dirty or dry air can be irritating to pockets that aren't used to use. Start with short runs to build up your tolerance. Running on wet days can help -- the air is cleaner, wet, and less irritating. Good nose breathing will humidify and filter the air through your sinuses instead of passing straight to the lungs. Huffing steam through your nose in the shower before or after can calm the irritated tissue. If that doesn't work, reactine or a puffer can help. A light puff deep in the lungs _before_ the run can help stave it off.