Shoulder Conditions

Pec Major Rupture

Pectoralis Major Rupture (Pec Tear): Causes, Symptoms and Treatment Options

A pectoralis major rupture, often referred to as a pec tear, is an uncommon but significant shoulder and chest injury. It most commonly occurs during high-load activities such as weightlifting or contact sports and can lead to pain, weakness, and visible changes in the contour of the chest or upper arm.

Early assessment is important, as treatment decisions and outcomes may differ depending on the severity of the tear and how soon it is addressed.

What is the pectoralis major muscle?

The pectoralis major is a large, powerful muscle at the front of the chest that connects the chest wall to the upper arm (humerus). It plays a key role in:

The tendon of the pectoralis major inserts into the upper arm bone (humerus), and most ruptures occur at or near this tendon attachment.

What causes a pectoralis major rupture?

Pectoralis major ruptures most commonly occur during activities involving forceful contraction of the muscle while it is being stretched, such as:

Bench pressing or heavy weightlifting

Sudden pushing or tackling in contact sports

Falls or other high energy traumatic shoulder injuries

The classic mechanism is during the lowering phase of a bench press, when the muscle is under high tension.

Symptoms of a pec tear

Common symptoms include:

Sudden pain in the chest or front of the shoulder
A tearing or popping sensation at the time of injury
Swelling and bruising over the chest or upper arm
Weakness with pushing or lifting movements
Visible deformity or asymmetry of the chest
A “bunched up” appearance of the muscle toward the armpit

Symptoms may vary depending on whether the tear is partial or complete.

Types of pectoralis major injuries

1 Partial Tear

Some fibres of the muscle or tendon are torn, but the muscle remains partially attached. Strength and function may be reduced but not completely lost.

2 Complete rupture

The tendon fully detaches from the upper arm bone. This often results in noticeable deformity and significant weakness, particularly with pushing activities.

1 Partial Tear

Some fibres of the muscle or tendon are torn, but the muscle remains partially attached. Strength and function may be reduced but not completely lost.

2 Complete rupture

The tendon fully detaches from the upper arm bone. This often results in noticeable deformity and significant weakness, particularly with pushing activities.

How is a pectoralis major rupture diagnosed?

Diagnosis involves:

MRI is particularly helpful in distinguishing partial from complete ruptures and in guiding treatment decisions.

A detailed injury history, including the activity at the time of injury

Physical examination assessing strength, contour, and tenderness

MRI imaging to confirm the location and extent of the tear

How is a pectoralis major rupture diagnosed?

Diagnosis involves:

1 A detailed injury history, including the activity at the time of injury

2 Physical examination assessing strength, contour, and tenderness

3 MRI imaging to confirm the location and extent of the tear

MRI is particularly helpful in distinguishing partial from complete ruptures and in guiding treatment decisions.

Individualised care with a shoulder specialist

Sports-related shoulder injuries require careful assessment to ensure the correct diagnosis and appropriate management strategy. Dr Richard Dallalana provides specialist assessment and management of sports-related shoulder injuries, with a focus on understanding injury mechanisms, sport-specific demands, and long-term shoulder health. Treatment is in conjunction with other practitioners as required and often a multi-disciplinary approach is needed.

Non-Surgical Treatment for a Pectoralis Major Tear

While pain may improve with non-operative care, some loss of strength or visible change in muscle contour can persist, particularly with complete tears.

When Is Surgery Needed for a Pectoralis Major Tear?

Surgical repair is often considered for:

Early surgical repair is preferred when surgery is indicated, as delayed repair can be more complex.

Full rupture is a time critical injury since scarring and retraction of the muscle and its attached tendon will prevent it from being able to be reattached to the bone. Additional grafting may be required to achieve a repair if the injury is more than 6 to 8 weeks old, and results are less favourable.

Pectoralis major repair surgery involves reattaching the torn tendon to its normal attachment point on the upper arm bone (humerus). The specific repair technique is selected based on the location and pattern of the tear and may involve the use of sutures, suture anchors, or other fixation methods to securely reattach the tendon to bone. The aim of surgery is to restore the normal anatomy of the muscle–tendon unit, improve shoulder and arm strength, and support a safe return to functional and sporting activities where appropriate.

Recovery following a pectoralis major rupture varies depending on whether surgical repair is performed. Rehabilitation is a structured process and typically involves an initial period of protection in a sling to allow the repair to heal, followed by a gradual return of shoulder and arm movement. Strengthening is introduced in a staged manner, with progression tailored to healing and functional demands. A graduated return to sport or heavy lifting is important to reduce the risk of re-injury. Full recovery often takes several months, and rehabilitation is carefully guided to support healing and restore function.

When to See a Shoulder Specialist for a Pec Tear

Pectoralis major ruptures are uncommon and require careful assessment to ensure appropriate management. Dr Richard Dallalana provides specialist evaluation of chest and shoulder injuries, focusing on accurate diagnosis, realistic expectations, and treatment tailored to activity level and goals.

You should consider specialist review if you experience:

Early assessment and scanning can help confirm the diagnosis, determine the extent of injury, and guide the most appropriate treatment pathway.

If you’re experiencing ongoing pain, stiffness, or reduced movement that is affecting your daily activities or quality of life, a thorough orthopaedic assessment can help determine the cause and guide the most appropriate treatment options for your situation.