Chest pain can be terrifying, especially when you're unsure whether it's anxiety or something more serious like a heart ...

Chest pain can indicate an injury to your ribcage, surrounding muscles, or connective tissue. Pulled muscles, fractured ribs, and arthritis are all potential causes. Your musculoskeletal system ...

Developing bigger pectoral muscles, or "pecs," is one of the most common goals for anyone focused on building upper-body strength or improving their physique. After all, a strong, well-developed chest ...

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 ...

You may have rolled your eyes as a teen when an adult told you to “stand up straight” or “stop hunching your shoulders,” but they had a good point: poor posture can lead to misalignment, muscle and ...