Add Yahoo as a preferred source to see more of our stories on Google. "If there's one thing that'll earn you respect in the gym, it’s a powerful, chiseled upper body—and that starts with your chest," ...

Having well-defined pectorals, or “pecs” for short, is essential to a balanced body. A great chest definitely turns heads, but more importantly, it’s essential to making an athlete stronger for ...

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 major muscle in ...