Yeah, "doing it wrong" in the sense of doing it at all. Sure, calluses and all, not stretching the skin over the knuckles, etc., I know. But fists still are so not good for punching that, as I said, many martial arts don't use it at all (e.g., in Tai Chi Chuan punches are performed only with the back of the (fisted) hand). One would think that if the fists evolved for punching, as the study seems to claim, they would be built for punching, which they aren't really - notwithstanding the fact that with lots of conditioning, practice, and thinking about it you can kind of use them for punching