From 21-inch biceps to freakish triceps, these five bodybuilding legends redefined what elite arm development looks like.

The biggest stories of the day delivered to your inbox.

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? And, while working your arms is pretty straightforward, sometimes it can be ...

Our top picks for the best at-home gym equipment include something for every price, size, and space. From affordable treadmills to premium bikes, dive into our favorites.