When most people think of bigger arms, their mind immediately goes to biceps. But here’s the truth seasoned lifters understand: your triceps make up nearly two-thirds of your upper-arm size. If you ...

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 ...

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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 ...

Attach a rope handle to the high pulley of a cable station. Grab the handle and turn away from the machine with your hands at shoulder height. Fully extend your arms forwards and in front of your head ...

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 ...

This exercise works the back of the arms, including the often jiggly area of skin underneath the upper arms. It can be done using a weighted cable machine or a resistance band attached securely to a ...

YOU CAN'T BUILD big arms with a narrow focus on just one type of movement. To be more specific, you'll need more than just dumbbell curls to sculpt the type of fully-formed, 3D muscles you're aiming ...

Building serious arm size takes more than pressing on repeat. To fill out a sleeve and add lockout strength, put the triceps extension in regular rotation. This classic elbow‑extension move is one of ...

Cable machines are one of the best and most versatile pieces of equipment in any gym. With a simple adjustment in pulley height, handle attachment, or weight, you can train multiple movement patterns ...