Muscle isn't the only thing that matters. Here's how you can tap your hidden potential—and bulletproof against injury.

Your pectoralis major is a large and powerful chest muscle that’s shaped like a fan. It starts from two sections: your breastbone (sternum) and your collarbone (clavicle). The two sections come ...

Mastering proper dumbbell fly technique can be the missing link between a stagnant chest and noticeable gains in strength, definition, and upper-body power.

Muscle isn't the only thing that matters. Here's how you can tap your hidden potential – and bulletproof against injury.

BALTIMORE – A torn pectoralis major muscle, or pec muscle, is a serious injury striking boxers, pro wrestlers, body builders and even a growing number of military servicemen. It's a condition that ...