LOL Didn't mean to scare you Jeff. I should have pointed out that the aforementioned were just 3 among thousands of runners etc. I've come across.
If you're still worried, remember, everything in moderation unless you have my superior genes or you want to die doing something you really enjoy.
Actually, I forgot to tell you about another friend I used to run with (this is true), he took up cycling and one day he climbed a moderate hill as he had done many many times before. When he got to the traffic lights at the top he stopped, collapsed and went to join the great runners/cyclists in the sky. He was just 40! If that doesn't scare you - nothing will.
The problem with most of these stories is that in most cases we don't know the health background of these guys. Yes, fit they were, at least on the surface but did they have any signs before and just kept quiet thinking it was nothing? Were they actually born with some defect which manifested itself much later in life. And had their participation in sport kept them going longer than they would have kept going had they led a sedentary lifestyle?
Well, that should empty the forums a bit. It was getting too crowded in here anyway!
Oh, I forgot to mention - non of the above unfortunate characters trained above Zone 3. That much I do know. TYSON