I have this:
http://orthopedics.about.com/cs/spra...chondritis.htm
I was working out bench pressing) one day and suddenly had the worst chest pains ever. Went straight to the hospital where I was diagnosed with the above conditions. To be sure it wasn't my heart I had a stress test 2 weeks later.
It took around an hour, my air intake was measured, blodd pressure etc etc. I was on a treadmill for around 40 minutes all up. Started slow and pregressively got harder. I did brak out in a sweat but it was by no means exhausting.