Almost every guy who starts lifting as a teen admits the first thing he wants is bigger arms. He dreams of filling out a t-shirt, hitting a huge bench, and yes, probably spends hours each week on ...

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. You probably work your ...

With so many possible exercises capable of building muscle, it's often hard to know which ones are actually worth doing. Sam Sulek rose to prominence on YouTube with his raw approach to filming and ...