I never mentioned body builders, I mentioned Strongman <<people who lift heavy stuff for a living. I run track, and box. I know what I'm talking about.
Judging by your earlier input in this thread, I would have to respectfully disagree. I have backed up my points with fact based scientific, referenced evidence, whereas you have offered no more than your opinion, and with all due respect, I would be more inclined to agree with the highly regarded sports biomechanists, boxing trainers and powerlifting coaches who I have made reference to, as opposed to your opinions. If however, you can show me some form of scientific, referenced research of your methods, then as an open minded person, I will be happy to read through whatever research that you can provide some sort of links to, and if your advice is proven to be more effective than mine, then I will also, happily eat a big slice of humble pie. If you wish to bury your head in the sand, that is entirely up to you, infact, I respect the courage you have in your convictions; however, when the original poster is looking for advice for a specific area of training, you would be better served by offering advice that is backed up by scienific research rather than one's own opinion.
strengthen your legs above all else because these have the most inertia to overcome even if u only did max strength training on your legs u would find yourself able to move quicker on your feet and punch harder it won't however increase the speed of your side snap kicks(this sounds irrelevant but i'm trying to make a point) because a side snap kick has no mass for the leg to move which brings me to another point - the arms don't overdo it with the arms they don't need a great deal of strength like the legs do because they have no inertia to overcome apart from the gloves if u was a shotputter though u would need very strong arms to launch 7+ kilos in the air the torso does need quite a lot of strength but not to the extent that the legs do do heavy situps, overhead med ball throws, and torso twists with a cable machine, deadlifts and core stability excercises (others have already been mentioned) as for machines i think MOST of them should be avoided except calf raises, legpress(use one leg and place the foot low on the platform to emphasise the front part of the quads) higher up will emphasise the glutes/hams more forget the leg extension it's more functional to use the leg press in the way i just mentioned and cable twist for the rotational strength occasionally i will use a smith machine for close grip benching