Am I arm-punching too much?

[c0r1nth14n]

So lately I've noticed that, when working with a pad/mitt holder, my right shoulder gets really tired by the end of 3 rounds. I'm worried I may be arm-punching rather than throwing with proper form, mostly on the right cross. I tried asking my coach, he said I was doing ok, but the shoulder thing bothered me. Does anyone have any tips on how to make sure you're not arm-punching?

 

[FadeIntoViolenc]

Do a lot of body rotation exercises...

focus on OVER rotating your core when you shadowbox or do some drills by yourself.

that's what I do anyways, worked for me.

but i'm no expert