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. The upper back is an ...

When you think of arm muscle, you probably think of the biceps, the muscle that’s at the front of your upper arm. While the biceps hog the limelight, it’s actually the muscle behind it, the triceps, ...

So you’ve got yourself a gym membership or bought a set of home weights. Now what? With the sheer amount of confusing exercise advice out there, it can be hard to decide what to include in a weights ...