Yeah because how many of you have taking physical biology? I guarantee a heavyweight can't literally hit twice as hard as a guy half his size... THe human body doesn't work that way. This is a why in weightlifting there are little guys who can put 3 times their weight over their head, yet you will never see that at the heaviest weights. Human's do not gain strength proprotionate to size. An example in football Michael Vick is like 213 pounds he can bench press 450 pounds... that is as much as most offensive linemen in the NFL can benchpress. Shane Mosley bench pressed 330, and thats what James Toney was supposedly doing when he fought Peter the second time. Heavyweights can definitely hit harder, but they can't hit twice as hard as somebody half their weight... even Mike Tyson when he was 200 pounds was able to hit as hard if not harder than guys 40+ pounds heavier than him. IN fact if a guy is too big they actually lose percentage wise power because a person like Valuev is too big to rotate his body effectively to deliver maximum potential to his punches. People underestimate how little of a difference it takes for a punch that doesn't phase you to be a punch that puts you to sleep.

As for what I said about heavyweight's chins.... They have proven that larger heads, especially thicker skulls help a person with sustaining damage to their head, however neck muscles, head size, and the rest of it do not increase to the same extent in larger people than do the size of their back, leg, shoulder, and arm muscles. Also handspeed doesn't slow down even close to as much as advertized by some the bigger and more muscular a person is.