[glitchc]

I think if Bolt really pushed himself, he could have broken sub 9.5 seconds at the peak of his ability. In all races where he dominated, we see him slack off right near the end once he realizes how much further ahead he is of everyone else.

[SJC_Hacker]

Is it slacking off or was it simply his limit.

[nervousvarun]

At this short of distance it would be slacking off. However if you watch his world breaking run (vid below) to me it appears he's likely not doing that.

Personally would argue these guys do this same sprint/distance so many times in practice/competition that they generally implicitly know when they're running a WR type time and generally don't slack off (in this video he's not in any threat of being caught but still presses on for the WR).

https://www.youtube.com/watch?v=3nbjhpcZ9_g

[Vvector]

Did you watch his races?

[walthamstow]

Not to mention the diet of chicken nuggets, particularly in Beijing where that was basically all he ate for weeks.

[iknowSFR]

He broke his own WR in 2009 in Berlin.

[hanniabu]

For both the 100m and 200m