Wonder how much fear has to do with the effect on punch power.?

Dont get me wrong, i rate tyson to the max and he easily in my top five heavyweights of all time.

But i wonder if you are already shook in the ring or not as confident as you would normally be whether your punch resistance would decrease.

Alot of fighters were scared of tyson but im sure it wouldnt have affected their chins as the result would have been the same.