11/21/2025
A pectoral tendon injury happens when the pectoralis major tendon—the tendon that attaches your chest muscle to the upper arm—is partially or completely torn. Common causes:
· Sports activities
· Weightlifting
· Sudden force on the chest/shoulder
Partial tears affect the sternal head, while complete tears affect both the sternal and clavicular heads of the muscle.
What is a pectoralis major tendon injury? The pectoralis major and pectoralis minor are large fan-shaped muscles that line the chest wall. Both the pectoralis major and pectoralis minor muscles are responsible for strengthening and stabilizing the shoulder when lifting heavy objects. The pectoralis....