Speed endurance the key to *all* 11/12second sprinters?

[Spaceman]

@Track007

Whatever it is he does, Bolt seems to get his 200m time down quite low in a very short period of time (clearly after top speed is in place) but appears only to need a period of 3-4 weeks of concentrated 200m work to bring his times down to what we have witnessed in the past couple of years. For example in 2008 he ran 19.76 (-0.4) at Crystal Palace on 26th July and ran it quite hard (it was only 0.01 outside of his personal best).

I was at Crystal Palace and for the last 30m he was doing his usual cruise-in thing

And Bolt had run 19.67 into headwind in Greece before that 19.76 run at CP