bodybuilding training for hamstrings more effective than max strength speed

There was actually a study not long ago that showed larger athletes (on average) up to 400m versus 60/100m.

The reigning WIC for 60m is pretty small overall. Andre Cason is TINY and one of the best 60m guys ever.

Michael Johnson is/was bigger than BJ/Cason/Mo and specialized in the longer sprints.