TERES

MAJOR

• Origin

Lower lateral border and inferior angle of the scapula

• Insertion

Medial lip of the intertubercular sulcus of the humerus

• Agonist(s)

- Latissimus dorsi

- Deltoids

• Antagonist(s)

- Supraspinatus

- Infraspinatus

• Function

Extends, adducts, and internally rotates arm

TRIGGER POINT(S)

• Location

Trigger points can be found along the length of the muscle, particularly near the lateral border of the scapula.

• Pain Referral Pattern

Pain may refer to the back of the shoulder, the upper arm, and sometimes down to the forearm.

It can cause aching, burning, or sharp pain in the posterior shoulder region, and may contribute to discomfort or restricted movement in the shoulder and arm.

• Potential Causes

• Overuse or repetitive activities involving internal rotation and adduction of the shoulder, such as swimming, throwing, or certain weightlifting exercises.

• Poor posture, especially rounded shoulders.

• Muscle imbalances between the teres major and other shoulder muscles.

• Trauma or injury to the shoulder or upper back area.

• Prevention Tips

• Use proper techniques and form during shoulder exercises to avoid overloading the teres major.

• Incorporate regular stretching and strengthening exercises for the shoulder muscles.

• Ensure proper warm-up and cooldown routines before and after exercise.

• Maintain good posture and ergonomics during daily activities.

• Ensure balanced strength training to avoid muscle imbalances.