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 ...

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 ...

Michael Strahan reached out with his right arm, straining every muscle attempting to corral Curtis Martin of the Jets. As Strahan moved in for the tackle, the right side of his body was tested like it ...