funkman wrote:
I would suspect most IM triathletes are not even close to their genetic limitations.
.....
Most Kona AGers aren't genetic freaks..
I agree with the first statement, but then "most" IM triathletes finish in, what, 14 hours?
I also agree that Kona qualifiers aren't freaks. But I do think that more and more, they have a genetic predisposition to the demands of the sport.
I might be off track here, but I think the relatively significant, steady decrease in the needed qualifying time in a given age group over the last 20 years (call it the "need to qualify to get to Kona vs. just signing up era - also the aero-bar era, the main time drop due to equipment had already been made), as the number of people racing the distance grows, argues strongly that now, more than ever, genetic potential plays a role.
What I mean is 10-15 years ago a given combination of serious training hours and a reasonable accumulation of experience could get you a time that would qualify for Kona, and that same time today won't even come close. What changed? Not how hard the qualifiers were training, as far as I can tell. The body can only absorb so much. What changed is that many more people started training at that level, and in selecting from a larger pool, more people predisposed to do well from a physiological point of view are identified (because they go faster), and they take those qualifying spots. If genetics played no role (and I know not everyone is saying that), or a very limited role and could readily be overcome, the times would not be dropping as consistently and sharply as they have. Back then, there were genetic freaks at the pointy end of every age group. There still are - they turn pro (or were pros). The winning times haven't necessarily dropped (in some cases the opposite)....What has dropped is the slowest qualifying time. Because more of the people who respond best to training are available to fill in behind the fastest possible people.
In the top quarter of an age group, the non-qualifiers aren't uniformly training less or less well than the qualifiers.