Bolt splits in 9.58

Also for Charlie and anyone else. What could the cause be for Powell’s apparent lack of extension or even stiffness in the hip region.

-Could he be consciencously trying to move a certain way causing just enough tightness to keep him from “opening up”. In a sense, not running naturally

-Could it simply be a cause and effect of his knee lift?

-Could his arm action improve:
I noticed his arm action during the prelims of Berlin changed(q-final mainly). This gave at the very least a visual impression of an ability to move better in the middle of the race.