WASHINGTON - Flex your arm. You already know which muscle you're showing off. The biceps are among the most recognizable muscles in the human body, but they share the upper arm with a less-celebrated ...

Training your triceps helps tone your arms, making them stronger and more defined. Strong triceps support your upper body ...

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 ...

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 ...

Get more out of your tricep training by knowing which cable attachments provide a deeper range of motion and joint-friendly reps. Cable tricep attachments differ in effectiveness, grip comfort, and ...