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 ...

Think doing the best bicep exercises is enough to get you jacked arms like The Rock? You’re mistaken. Yes, the biceps may give your arms that nice rounded ‘peak’ in the front of your t-shirt, but it's ...

A tricep dip performed on a workout bench or elevated surface is an excellent entry-level exercise that lays the foundation for more advanced movements, like tricep dips on a dip bar. It's a simple ...