Basically, it's a question of race tactics. When you run a tactical race, talking about racing your PB (or 10 standard deviations) becomes irrelevant. In Boston, the elite Africans screwed the pooch by running the first 30K at 2:10 pace. This tactical question wasn't posed to the women, who had an aggressive pacemaker doing all of the work, nor the American men, whose PBs are 2:10 or slower.So the question at 15K was, who posed the bigger threat, Meb, or the best of the rest? Meb is an ageing and proven 2:09 runner in his prime. Despite his 4th place Olympic showing as long ago as 2012, it's highly credible that he was still considered a lower threat than the other Africans in the main group. The favorites, Kimetto and Desisa were gauging each other, while Chebet and the rest were watching them, ready to cover any move. Anyone else who makes a move, runs the high risk of sacrificing his own victory, by becoming a pacemaker for someone else (if you don't suffer the fate of Boit, finishing at 2:12:52). This hesitation is what prevented everyone else, from attempting to break away from the two favorites, Kimetto and Desisa. And as we know, Desisa and Kimetto, DNF'd.At 30K, the elite group had spotted Meb 81 seconds. How fast do you need to be to close that gap? Meb consistently ran 2:08:14.5 pace up to 30K, losing 89 seconds over the last 12.2K, running 2:09:32 pace. How fast do you need to be to close an 81 second gap at 30K, against Meb closing at 2:09:32 pace? If you close it over 12.2K at your best marathon pace, you need to be a 2:04:52 runner (in Boston). Maybe it was possible for Kimetto, a proven 2:03:45 runner, in Chicago, who DNF'd with a hamstring injury. But for Desisa (who also DNF'd), a 2:04:45 runner in Dubai, or for Geneti, a proven 2:04:54 runner, in Dubai (who only clawed back 8 seconds with a 2:09:50) or for Chebet, a proven champion on flat courses like Rotterdam and Amsterdam, with a PB of only 2:05:27, 3 years ago in 2011, it's not obvious that the race wasn't already over at 30K.It doesn't seem surprising to me that for Chebet, a 29:26 effort from 30K to 40K (2:04:12 pace, again in Boston) took away his ability to close in 6:30 (he closed in 6:51).
troofiness wrote:
7890 wrote:And five guys broke 2:10 - that is hardly everyone blowing up as you claim.
A few pages back, somebody pointed out that most 80%of the women were within 1:00 of their PBs
Most of the American men 70-80% were within 1:00 of their PBs
But ALL of the invited men were 3-4:00 off their PBs.
So yeah...they all screwed the pooch at the same time, which is at least 10 standard deviations from the mean.