I would like to understand why, all my life, I can't do strenuous exercise without having to stop because I feel that I am suffocating. I had to stop in the middle of a strenuous dance routine and sit down because of this condition. I was the only girl in my athletics class that got an E for running the 400 yard dash. I would start feeling as if I couldn't get any oxygen into my lungs. I felt I was suffocating. I have been seen by a Pulmonologist. I do not have exercise- induced asthma. No doctor can give me any diagnosis. This is life- long. At five I would have to stop jump roping, because I couldn't seem to get oxygen in my lungs.