I met him once when he came over to congratulate me once on a boxing win. (EDIT) Actually, i feel bad for slagging him off. He really was just a decent, genuine guy.
And a young Tyson did lift weights, just not like a bodybuilding routine. He lifted them when he was in borstal and he would train with them intermittently, but mainly as a boxing routine He would do barbell shrugs, neck bridges, press-ups and go for jogs with a 50lb backpack on, as Cus believed it would stop him from growing too tall and ruining his fighting style.
Read that one before. I'm calling BS on it,right now. Just like with bodybuilder's routines, there's a lot of nonsense online, concerning the training routines of fighters.
Not sure about the barbell shrugs either. In all the video's and first person accounts it seems ,pre-prison,Tyson just did the standard boxer's routines and exercises.