The pectoralis major has two heads: the sternocostal head and the clavicular head. These two heads help you move your arms in different directions, and as one head contracts, the other relaxes.

The major muscle in your chest is the appropriately-named pectoralis major—which is, literally, Latin for “the major muscle in your chest.” We call these the pecs for short.

Weightlifters and football players can injure their chest muscle known as the Pectoralis Major, which allows you to reach strongly across your body. Surgery may be required to repair the tear ...

The pectoralis major myocutaneous flap (PMMF) remains a cornerstone in head and neck reconstruction, particularly in scenarios where free flap surgery is contraindicated or has previously failed.

And remember, a good warm-up stretch with bands can help prevent injuries to your pectoralis major and pectoralis minor—as can a good back workout to help round-out your regime.