NO! living in the past, It is wrong to assume I or Jeff Nelson either were born with some sort of genetic character that could make us run well. The only time genetics come into play is AFTER the deed has been done. It is an ad-hoc-ergos-propler-hoc logic that simply does not exist. You are looking back at what was accomplished and deducting from it what must have existed.
I want you to know that I personally was a basket-case genetically. 105 resting heart rate; Oxygen uptake at 4.8l;I was excused from all excertion in PE. By 1968 my resting heart rate was 38 and oxygen uptake was at 7.8l. But inbetween those years there was a lot of hard work that went into it.
As for the running revolution, I think it was beginning in the late '60s and early 70s. Sort of like California Syndrome, yes?
My message to youth is that YOU DON'T KNOW WHAT YOU GOT TILL ITS GONE. There is NOTHING unhealthy or life threatening about running mega-miles. Kenyans and Ethiopians do it every day. Why run under a blanket of fear? When you get older and understand what you used to be able to do, you will reflect back on some amazing skills and abilities that are no longer there. I want to tell youth to do EVERYTHING POSSIBLE with your youth rather than cow-tow to a bunch of looser physiologists who simply don't know. In my days too, we had the same types telling us similar horror stories. I was told not to run distances until I was at least 24 years old. Doing long work any younger than that and your heart will slow down. Eventually it will stop and you die. Same fear, different source.
I see so much fear-of-injury logic on these boards that it really makes me angry. The chances of injury is greater in runners who run less milage than it is in runners who run more milage. The only difference in those who run more milage is that halfway through a hard race they have more capacity left in them than runners who run less miles.
And, just for argument, lets suppose there is some sort of long term health risk of running so much (which there is NOT). Would you live in fear rather than use the body you have to benefit track, sports, and the general health of the whole world? What you do as a runner causes determination and heart in others. Are you so important you would sacrefice the good you can do? If I had to do twice the milage I did, suffer untold hardships through life to have had the affect on running that I have had, I would gladly do it all over again. The Gods did not create you to live cowered in selfish fear. You were designed to FLY!