What is the pectoralis major tendon?
The pectoralis major muscle is a large powerful muscle at the front of the chest. It used to rotate the arm inwards, pull a horizontal arm across the body, pull the arm from above the head down and pull the arm from the side upwards. It is most likely to rupture at the point where it inserts into the arm (humerus). It is more common in weight training, especially when performing a Bench Press.
