text: if you punch sum1.......does a really big forearm help?? how.........? wats the use of building ur forearm....?..........wat will help in fiting......jus a quick question......cuz theres this bully who wants 2 fite me........ a good punch is a full body movement. a powerful punch comes more from your legs, shoulders, and stomach, than from your arms.  get a heavy bag, and just work on punch combos for a week or two.  don't go full force, because if you haven't done much boxing your wrists won't be able to handle the stress at first.  do lots of push ups and sit-ups.  doing push ups on your knuckles will also help get your wrists stronger.  once you have some speed, then start working on adding power.  a jab is to stun, and its just a quick hit.  when you want to do damage you want to use more weight, and drive the punch into them for optimal damage.  do like a right jab, left cross, right power, solid left to the body, then a power right to the stomach, as they hunch down from having the wind knocked out of them, just give them a right cross from your elbow. boom, fights over in about a second flat.  really tho, fighting should always be the last option.  if you are an experienced fighter, you can do lots of damage with a single blow.  fights rarely last anywhere near as long as they last in movies, or boxing.  a single solid un-gloved hit to the head will end most fights.... one good hit can cause... detached retina, broken nose, broken teeth, lockjaw, and even damaged hearing.