Sorry for the triple post - why don't they have an edit option?
HRE - I know what you are saying about people needing to train more and shortchanging themselves quite often based on what they perceive as their talent level. For a while that was my philosophy. What happens, though, when you just can't train more?
I started running in 7th grade and started running what I would call "seriously" in 9th. From 10th through 12th I was putting on what we called heavy mileage (compared to my teammates; we weren't a powerhouse, as you can tell) - consistently in the 60s. So, relative to everyone else, I had a very strong base. I got my first major injury as a junior during track season -- a stress fracture. A stress fracture is something that I think is fairly safe to say is caused by "training more." Senior back in 60s. First couple years of college in the 60s, into 70s. Ever since my sophomore year of college, I have simply not been able to stay healthy. I'm running nowhere close to what I used to run and I'm stuck on an endless loop of injuries. My nutrition is not perfect, if such a thing exists, but I do know it's better than what it was when I was in high school. Neither of my parents nor their parents ever did any sports. I was truly the first of my kind. I hope to continue to be. I would love to go out and run 60, 70 80 90 100 mile weeks now. My body just seems not to be able to hand it anymore.
So I guess what I'm saying is,
1) you never know how training is going to affect you until much later
2) I would be cautious about advocating that people "train more"
Underrated: Being mindful of yourself, if those are the doctor's orders.