Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Arm day can be one of ...

Think doing the best bicep exercises is enough to get you jacked arms like The Rock? You’re mistaken. Yes, the biceps may give your arms that nice rounded ‘peak’ in the front of your t-shirt, but it's ...

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 ...

The triceps are the large muscles on the back of the upper arms that are responsible for elbow, shoulder, and forearm movements. Working out your triceps helps to build upper body strength and is an ...

If toning the back of your arms is a goal, strengthening the triceps can help eliminate that common trouble spot that jiggles when you wave and help you feel more confident. But even more important, ...

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 ...

Triceps tendonitis can be caused by overuse, often due to work-related activities or sports, such as throwing a baseball. It can also occur due to a sudden injury to the tendon. There are several ...

If you tend to walk right past the cable machine at the gym, listen up. While you can always work your triceps with a set of dumbbells, the cable machine is an excellent way to isolate your arms and ...

Good things always come in threes: fairy godmothers, parts of a combo meal, boy bands made of brothers (Hi Jonas and Hansen!). So it’s no surprise the most eye-popping muscle in your arms is, in fact, ...

The secret to an upper body that looks fierce AF: cut triceps. This part of the arm often gets lost in the workout shuffle—while moves like biceps curls and presses take main stage. But when the ...