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

[system]

@Charlie_Francis

I would think it wouldn’t change that much. His previous year went pretty much without a hitch but much of the big improvement was already done. 2009 marked a matching and slight move past what had already been done. The difference in the 100 was less than appears because there was no shut down and the wind was more favourable. Similar for the 200, though I think more could have been seen in that event if he was more fresh, partially due to additional physical maturity.

How does this change though that he ran relatively faster in the 200m than the 100m in the season? He ran a lot more 100s and never had any performances that really can compare to that 200, which was likely good for 19.1 (in good conditions) at least.