Like I said, define wanted to. If you think either Bolt or Powell could squat >400lbs (double bodyweight) to parallel or below in a backsquat without significant work you are kidding yourself. Powell could barely do a lunge with handweights. If we look more generally at all sprinters, Muna Lee’s coach has said she could not even adequately handle bodyweight work when they initially began working together and she is still incredibly weak even after some years of training.
Everyone talks about fiber composition as-if it is the end all be all and there are plenty of sprinters that have lifted seriously that aren’t putting up great numbers by any means (even when they try). This is one of the worst misconceptions on the internet about sprint training, I think. If it was the case then there would be thousands of sub 10 guys on the internet and these forums because numerous people can squat 2x bodyweight to parallel with minimal to no training and have no hopes of even breaking 12, let alone 10.
**Minimal to no specific training in the squat. Just general strength training, not necessarily focused on improving 1rm.