Originally Posted by 'Ben'
I've just also recalled that Juan Diaz never goes running. That guy has one hell of a workrate when he fights, so it just shows how much fighting the full distance is more to do with the mind than anything.
He doesn't run, but he still does a ton of cardio work. He just uses the stair master and he swims alot instead. IIRC it's because he finds it easier on his knees. There's a video on youtube somewhere where he talks about it.