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 ...

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, ...

The triceps — the forgotten halves of the upper arms. You might hear “welcome to the gun show” after a bicep pump, but rarely do you hear a clever quip about the triceps. Nevertheless, they’re ...

Training your triceps helps tone your arms, making them stronger and more defined. Strong triceps support your upper body during everyday movements and improve your ability to push and lift. Adding ...

They might feel good when you’re repping them out, but crushing curl after curl after curl just isn’t enough if you’re serious about building sleeve-busting arms. Sorry to be the bearer of bad news, ...