Firming your upper arms requires building lean muscle in your triceps and biceps. Many gym-goers turn to machines for their ...

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 ...

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 ...

Believe it or not, the skullcrusher isn't the name of a pro wrestler's signature move. It's actually a classic muscle-building exercise to isolate the triceps, the big muscles on the back of your arms ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Building your upper body strength can be a great place to start your ...

Effective arm training should target both the biceps and triceps with a mix of single-joint and compound exercises.

Add Yahoo as a preferred source to see more of our stories on Google. IT'S SAFE TO say that building big arms is a primary fitness goal for a lot of guys. Contrary to the popular belief, though, ...

A big, strong, sleeve-popping pair of arms has long been a key calling card to a superhero physique. From athletes to superhero actors to construction workers, powerful forearms, ripped triceps, and ...

The triceps brachii is a three-headed muscle on the back of your upper arm. It works to straighten your arm and assist in activities involving pushing and pressing. These effective triceps exercises ...