boxing

you've to devlop your triceps because it makes your punches more powerful and make them not lose on speed unlike the biceps, your back can also give you a powerful punches just like those of Mike Tyson but you need good legs too

even if those muscles can help you devloping a great punches you've to train all your body ......

good luck and take care

Most guys that have that one punch, KO power are born with it. Most good knockouts come from good footwork, good angles, and proper execution/ form. All punches should come from your legs and core. Work exercises that create explosive power in your hip flexors and major leg muscles. I like doing heavy squats followed by box jumps, and fairly heavy lunges (carrying about 150lbs) followed by split jumps. Biggest thing to remember though, great punch strength will never come if your technique is flawed.

Punches come from the chest and the triceps. So, the first thing you need to start doing is pushups and bench press.

For extra triceps you can do Skull Crushers (aka French Press, Lying Overhead Extension), but be careful not to overtrain the triceps because they do get worked during push-ups and bench press.

But what good is a punch if you can't hold your ground? You need some core training if you want to keep your back off of the floor during a boxing match. For this, I recommend that you do a lot of abdominal work.

Purely for strength training I suggest putting your abs under length stress. Try doing a nonstop ab circuit for 8-10 minutes. For example (using the exercises in the Ab Circuit in the Jamcore Workout videos but with my own # of reps):

30 reps Side Oblique Crunch (for each side)
30 reps Floor Ab Crunch
30 reps Straight Leg Floor Ab Crunch
30 reps 90-degree Ab Floor-crunch
45 - 60 seconds of the Front Body Bridge
repeat as necessary until 8-10 minutes is up. Then stretch out your abs briefly with a back bend.

This will probably hurt a lot when you start. However, if you keep at it, it will get easier every time.
Once your abs start getting strong, try doing a hanging leg raises. These are extremely difficult, but once you get your first one, it will get easier to get more and more reps.

But wait! thats only half of your core! You've still got your lower back! The deadlift will give you some real power. Not just in your core, but in your whole body. Its a great exercise.
For more info on the deadlift:
http://www.exrx.net/WeightExercises/ErectorSpinae/BBDeadlift.html
and
http://en.wikipedia.org/wiki/Deadlift

some people like to bend their knees a lot during the deadlift (like in the animation in the first link). Others like to keep thier legs totally straight. I like to bend my knees slightly to absorb shock, but not too much. If you are already doing squats then I suggest only bending knees slightly during the deadlift. If you do not do squats then I suggest bending the knees during the deadlift so that your legs get worked.

I hope you become a rich and world famous boxer :)

Well, with boxing a lot of the punching comes from your core, meaning your abs, obliques and lower back.. those are realy muscle you should strengthen up.

Also, try working the shoulders, chest and triceps, since a punch is actualy the same kind of movement you make in 'push' exercises.

as of sets and reps, this wil depend..

do yoiu want to increase your maximum strengh? I suggest you switch between workouts with maximum strength (3-5 reps with maximum weight) and workouts with explosive strength, or speed strength. These are done with 12-15 reps. While doing the concentric phase of the exercise as fast as possible and the excentric phase takes about 3 seconds..

This should help you increase your strength for any type of sport

"Eat Like A Horse, Train like An Animal, Sleep Like A Baby And Grow Like A Weed"