Not saying it did, but the way those guys trained is barbaric by todays conditions. These dudes are breathing deep by round four. Some of these guys fought full fifteen rounders monthly. We can’t even begin to comprehend the animals that fought in the HE division in the 60s and 70s. Matter of fact go look 70s Detroit boxing gym videos and you’ll see what I mean. These dudes trained for thirty rounds…I don’t know a single boxer today that could keep that schedule for the amount of years some of these guys have. All due respect to fury, but a 6’ 2” fury might just be an average fighter and a lot gets made about his movement which nice and all but he’s a lazy fighter who leans and bends you and headlocks you. That wouldn’t many of the legends at all.