C.M.
My daughter was recently diagnosed with exercise-induced asthma. She developed it while playing soccer. The doctor didn't do any tests, he just prescribed us an inhaler. We take it with us when she's going to be running around and if she starts to wheeze we give her a puff and it helps. The doc did suggest she keep up with the running and such because the more she exercises the better her lungs will be.
The doctor told us that if the inhaler helps when she's running around then it's exercise-induced asthma. If it doesn't help we were to bring her back for more tests.