I wasn't exactly sure which forum I should post this question in but I felt this was the most appropriate one. So if there is a more appropriate one, feel free to relocate it (whoever is responsible for that). I wanted strictly a scientific answer to this question. How does weight affect a boxer's punching power and punch resistance? In boxing, boxers are divided into weight divisions. Weight can be composed of many things such as muscles, fat, bone size and etc. However, boxing doesn't factor in all of those separate things when dividing boxers into weight divisions. It doesn't matter what a boxer's weight is composed of. In the end, all boxers are divided by weight divisions (irrespective of how much of the weight is fat, muscles or anything else). So what I wanted to know was how much of an affect does weight have on a boxer's punching power and punch resistance. Do things like muscle mass, fat quantity, skull size and etc. matter as much as purely weight or is boxing correct in making those factors less significant? Does it scientifically matter whether a boxer is mainly made of fat or muscles or anything else when it comes to punch resistance and power or are these factors irrelevant or not as irrelevant as PURELY weight? Does a heavier person have greater POTENTIAL for power than a lighter person, irrespective of how fat or muscular they are? Does a heavier person (without taking into account the amount of fat or muscles) also have higher punch resistance than lighter people? If the answer is yes to these questions, then why / how would that be?