The pectoralis major muscle is a large muscle in the upper chest, fanning across the chest from the shoulder to the breastbone. The two pectoralis major muscles, commonly referred to as the ‘pecs,’ ...

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 ...

Between my job as a writer and my large breasts, I’ve found that at the ripe age of 33 my posture is seriously not OK. I always knew this, but in the past few years, my shoulders have gone from ...