A pectoralis major tendon rupture is a tear of the tendon that attaches the chest muscle to the upper arm bone. The injury is uncommon but increasingly recognized in weightlifters, particularly those doing heavy bench press, and produces a characteristic deformity, weakness, and bruising. Surgical repair in the acute period produces the best functional outcomes.
What Is a Pectoralis Major Tendon Rupture?
The pectoralis major is the large, fan-shaped chest muscle that originates from the sternum, clavicle, and ribs and converges into a single tendon inserting on the humerus just below the shoulder joint. The muscle brings the arm across the body, rotates it internally, and generates significant pressing power.
When the pectoralis major tears, the most common pattern is tendon avulsion from the humerus at the insertion. The tendon retracts medially into the chest wall, leaving a characteristic defect. Tears of the muscle belly or at the musculotendinous junction also occur but are less common and typically less symptomatic.
Tears are classified by location (tendon, musculotendinous, muscle belly) and completeness (partial versus complete). Complete tendon avulsions produce the most functional loss and are the most reliable indication for surgical repair.
Causes and Risk Factors
- Heavy eccentric loading of the pectoralis, particularly during bench press
- The bottom portion of a heavy bench press, where the muscle is most stretched and loaded
- Anabolic steroid use, which significantly increases the risk of pectoralis rupture
- Male sex, particularly men in their 20s to 40s who weight train
- Prior chest or shoulder injury
Symptoms
- A pop or tearing sensation at the chest or front of the shoulder during a heavy lift
- Sharp pain at the time of injury
- Bruising that spreads from the front of the shoulder down the arm and across the chest within 24 to 48 hours
- A visible deformity: loss of the normal axillary fold contour and a step-off or asymmetry of the chest
- Weakness in pushing, pressing, and adduction
Diagnosis
Dr. Chudik’s evaluation includes the mechanism, timing, and a focused examination. The deformity is often visible, particularly with the arm contracted (asking the patient to press the hands together in front of the chest accentuates the defect). MRI confirms the location and completeness of the tear and measures tendon retraction, which is critical for surgical planning. The Westmont office has on-site high-field MRI.
Treatment
Non-surgical treatment is appropriate for partial tears, for tears of the muscle belly, and for lower-demand patients. It involves rest, sling use for comfort, and progressive physical therapy. Patients may have persistent cosmetic deformity and some strength loss.
For complete tendon avulsions in active patients, Dr. Chudik performs pectoralis major tendon repair, reattaching the torn tendon to the humerus with suture anchors or cortical button fixation. Acute repair within two to four weeks is technically simpler because the tendon has not yet scarred in a retracted position. Chronic tears with significant retraction may require tendon graft to bridge the gap.
Recovery and Outcomes
Recovery after acute repair typically includes sling protection for four to six weeks, passive motion during that period, progressive active motion from six weeks, and strengthening beginning at three months. Return to heavy lifting and bench pressing is typically six months.
Outcomes after acute repair are very good, with restoration of most strength and resolution of the deformity. Chronic repairs have less predictable outcomes, particularly for strength recovery.
When to See Dr. Chudik
Schedule an evaluation as soon as possible after a chest-pop injury during weightlifting, particularly if you have bruising, visible deformity, or weakness with pushing. Time matters. Call 630-324-0402 or request an appointment online.