I searched for a thread on this but the thread I found didn't really answer my question. I also Googled exercise induced asthma but I'm a little confused. I read one website that said that being an athlete with EIA is bad for you, and athletes with this condition seem to die prematurely of cardiovascular diseases/problems. Perhaps I misread this website (hopefully). I am just wondering if this is true? Although certainly, it can not be good to have any sort of undue stress on your body. Also, if I start running (and/or biking) daily, will this help to improve my lung function/capacity, and thus improve my conditions while playing tennis? Or would I just put even more stress on my body?