One of the most important arm muscles is the triceps brachii (the triceps, for short). You use your triceps to extend your arm. It opposes the biceps muscle, which is used to flex the arm. You also ...

Add Yahoo as a preferred source to see more of our stories on Google. The back of the arm is a spot that many of my clients wish to tone and tighten. Most of them have a less-than-flattering nickname ...

Trainer, author, and fitness model Kirk Charles, NASM-CPT CES, knows that as you get older, life can get more complicated. But that shouldn’t prevent you from being on top of your game. He’ll help to ...

If your arm day training session is stuck in the same old slog of biceps curls to triceps pressdowns—then wash, rinse, repeat—it's far past time that you introduce some variety into your workout. Take ...