A barbell curl becomes less effective when the hips drive the bar upward and the torso leans backward. A cable curl becomes less effective when the shoulders roll forward, the elbows travel ...

For wider biceps, prioritize exercises that train more than the biceps brachii alone. Hammer curls, cross body hammer curls, ...

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 ...