Arm punches

I think it would be better to improve on your balance, stance or whatever it is that prevents you from getting good leverage in those situations.

 

In a boxing specific situation I think the best is to shadowbox, spar a lot, etc. I think not being able to get leverage simply means you're not in a position to punch. You could be reaching forward, perhaps your feet are too close together, it's hard to tell over tha interwebz.

 

All punches thrown whether it's in close, mid, or long range are all thrown with proper technique (aka legs, hips, shoulders, arms). Any normal "arm punches" thrown are a waste of energy and won't accomplish anything other than hurting yourself.
I don't know how you can compare arm punches to Barrera because he never throws arm punches, first time beginners throw arm punches.

 

What Mayweather throws are not arm punches. He doesn't completely commit to each and every punch he throws, that would be an extremely stupid thing to do.

 

In that light I do not understand your question. He does use his body in the punch, but he does not fully commit by throwing all out. How would biceps and triceps training aid in using less strength. Well anyway my answer to the original question would be no. In no way would that benefit you in varying your punching power.

 

Simply turn your waist in with the punch. It won't be as powerful as a punch that starts all the way down in your toes but it will be a lot more powerful than a froggy punch.

 

If you're looking to weight lift to increase your power, squat, deadlift, power clean and press, benchpress and wristcurls might be the way to go.

 

Why not spend the time and energy on figuring out how to fight without arm punching in the first place?

 

to work on balance...do exercises on just one leg. even just standing on one leg for a long amount of time might do the trick for some. depends how advanced u r