I'm saying when you extend your arm is when the triceps are doing the work and the biceps are relaxed. Ergo the triceps are a muscle group essential to extending your arms and the biceps are essential to contracting your arms and therefore the triceps would be more important to punching.
Hey working past "the burn" is what Ah-nold said is what builds muscles....who am I to argue with him Go watch 'Pumping Iron'
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