But your physical form w/r/t a sport isn't really a matter of controversy since no one thinks a 5'7" person is going to become a basketball great, although it's not totally impossible http://en.wikipedia.org/wiki/Spud_Webb
What I mean is, of course there is "natural talent" in being 6'7" that pushes you towards one sport and away from another, but that's not that interesting I don't think. What's interesting are those things-- chess, music, writing, film making, etc.-- that aren't tied to physical types, and so far the evidence seems to be that talent is largely a myth.
Now, the interesting question you raise is why do some people keep going and others give up.
But even in athletics it's more about the type of practice as shown by this study of swimmers: http://www.lillyfellows.org/Portals/0/Chambliss-Mundanity%20...
What I mean is, of course there is "natural talent" in being 6'7" that pushes you towards one sport and away from another, but that's not that interesting I don't think. What's interesting are those things-- chess, music, writing, film making, etc.-- that aren't tied to physical types, and so far the evidence seems to be that talent is largely a myth.
Now, the interesting question you raise is why do some people keep going and others give up.