I recall a training log from wottle in 1972 where he had to limit his workouts for much of the year because of injuries. his workouts still were incredible and the results great, but without the injuries, he might have been sub 1:44. He clearly left it too close. Running in last place and then bringing the full kick only in the last 50m is not smart. The pace he was going at the end illustrates that he could have gone earlier. But he won and that's all that counts.