The pectoralis major, a prominent chest muscle, spans the anterior chest wall, contributing to upper limb movements.

Origin:
Arising from the clavicle, sternum, and the costal cartilages of the upper ribs, the pectoralis major has its origin on the anterior chest wall.

Insertion:
The muscle inserts into the greater tubercle of the humerus, forming a sizable portion of the anterior shoulder.

Function:
The primary function of the pectoralis major is to flex, adduct, and medially rotate the shoulder joint, bringing the arm across the chest. Additionally, it aids in horizontal adduction and plays a role in various pushing movements, such as pushing open a door or performing a bench press. The pectoralis major contributes to overall upper body strength and is actively engaged in a variety of daily and athletic activities involving the upper limbs.

Best Exercises for the Pectoralis Major
The pectoralis major is the primary chest muscle responsible for horizontal adduction, shoulder flexion, and pressing movements. Exercises that emphasize controlled pressing and arm movement toward the midline are most effective for targeting this muscle.

Primary Isolation Exercises
Dumbbell Fly (Butterfly)

Compound Exercises
Bench Press
Machine Bench Press
Incline Presses
Decline Presses
Push-up

How to Emphasize the Pectoralis Major
Focus on bringing the arms together toward the midline during each repetition
Maintain controlled pressing without relying on momentum
Keep the shoulders stable to avoid excessive anterior deltoid involvement
Control both the pressing and lowering phases to maintain tension on the chest

Explore Exercise Technique and Execution
Each exercise listed above includes a full breakdown of proper form, muscle involvement, biomechanics, and safety considerations. Select an exercise to learn how to train the chest effectively.