The Hammer Curl Doesn’t Just Hit Your Biceps. It Builds the Muscle That Makes Them Pop

This move can unlock serious arm size if you do it right. We'll teach you exactly how.
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This under the radar muscle is the secret to big arms—and this exercise is the key to pumping it up

BUILDING BIG ARMS is about more than just one move. Yes, the dumbbell biceps curl is the go-to for most guys when they step to the rack looking for a pump—but it's not the end-all, be-all. That’s ...