The Best—and Worst—Exercises for Tricep Gains, According to a Trainer originally appeared on Men's Fitness.

The triceps (also known as the triceps brachii) is the muscle behind the arm, opposite of the bicep — and they get their name due to being made up of three different muscles. In order to tone and ...

Muscles Worked The tricep dip primarily targets the triceps brachii, the muscles on the back of your upper arms responsible for extending the elbow.

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs ...

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