Originally Posted by johnnyloadproductions

40 and above I would worry that I was having a mild heart attack.

I experienced chest pains when I was 17 that got pretty bad and actually got a battery of tests done (ended up being a waste). Turns out it was that I was swimming so much that the cartilage between my ribs and breastbone became inflamed from all the swimming.

I swam because of the fractures in my femurs from running.