9.69s in the 2008 OlympicsI was very interested in Usain Bolt's 100m world record of 9.69 seconds in the 2008 Chinese olympics. I especially wondered how much faster he could go, given his apparent slow down and showboating at the end of the race. Here's a video of the race and his time splits every 10m compared to the fastest ever:
As you can see he starts slower than most due to his height (like Carl Lewis) but only starts slowing down after around 75m, whereas the rest generally start to slow after 60m. But you can see that Bolt's 0.88s for the last 10m is too long, and that he lost about 0.05s due to his celebrations. I estimate he could have finished in 9.64s at least, which is an amazing improvement over his own previous best of 9.72s. Also there looks to be room for improvement in his start time, and interpolating from the best of the rest here suggests that perhaps 9.58s is achievable? Of course it is more lucrative to break the world record multiple times which may have been in the back of his mind?
9.58s in the 2009 World ChampionshipsI've just watched Usain Bolt beat his last world record by the largest margin since 1921 by running 9.58s in Berlin. I was wrong about him trying to break the world record as often as possible, while I was more correct with my estimate of his achievable limit of 9.58s. So can he go faster‽ Considering the talk of this being a slow track, him missing 6 weeks of training due to thorns in his feet, and the probable distractions after his olympic world record, then perhaps he can. Last month there was an analysis of