If you want defined upper arms, you should definitely train your triceps in addition to your biceps and shoulder muscles.

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 ...

Here's why—and how—you should add this new piece of equipment to your fitness arsenal. A weight belt is a training tool that doesn’t get enough love these days. And I’m not talking about a belt you ...