A pectoral strain is a tear or overstretching of the pectoralis major or minor muscles, located at the front of the chest. The pectoralis major is the large, fan-shaped muscle responsible for movements like pushing, lifting, and pulling the arms toward the body. A strain occurs when this muscle or its tendon is overloaded or overstretched, leading to pain, weakness, and sometimes bruising or swelling in the chest or front of the shoulder.

An analogy…

Think of the pec muscle like a thick elastic band across your chest. If you stretch it too far or too suddenly, especially under load, it can snap or fray, just like what happens during a strain.

What are other names that a pectoral strain can be referred to?

Torn Pectoral, Pec Strain, Pectoral Muscle Strain, Strained Pectoral, Pectoral Tear

What causes a pectoral strain?

A pectoral strain typically happens when the muscle is placed under high load in a lengthened position, especially during exercises like bench press, dips, or chest flys. The most common cause is excessive force during the eccentric (lowering) phase of pressing movements, where the muscle is trying to control a stretch. Strains can range from mild micro-tears to complete ruptures, especially where the muscle connects to the upper arm bone (humerus).

What are the signs and symptoms of a pectoral strain?

• Sudden sharp or pulling pain in the chest, armpit, or front of the shoulder
• Swelling or visible bruising in the chest or upper arm
• Weakness or pain during pushing movements
• Limited range of motion, especially when extending or rotating the arm outward
• A palpable gap or divot in the muscle
• Muscle tenderness when pressing or stretching the area

What tests are used to diagnose a pectoral strain?

Physical examination: Palpation and strength testing to assess muscle pain, swelling, and function

Range of motion testing: May show discomfort or restriction with arm movement

Strength tests: Pushing and adduction may be weak or painful

How long does a pectoral strain take to heal?

Recovery depends on the severity of the strain. Mild strains may heal in 2–4 weeks, moderate tears can take 6–8 weeks, and severe or complete tears (especially involving the tendon) may require surgery, with rehab lasting 3–6 months or longer.

How does a pectoral strain happen?

• Heavy lifting
• Poor technique or lack of warm-up
• Muscle imbalances between chest and back muscles
• Fatigue or overtraining
• Explosive or uncontrolled movements

What treatment can help a pectoral strain?

• Ice in the first 48–72 hours to reduce swelling
• Soft tissue therapy to manage muscle tightness
• Gradual stretching and strengthening exercises
• Corrective technique and postural training

What exercises or stretches can I do for a pectoral strain?

• Pendulum or assisted shoulder movements
• Isometric chest presses
• Scapular control and posture exercises
• Band or cable internal rotation/adduction
• Progressive pressing movements

What products can help with a pectoral strain?

• Trigger Ball
• KT Pilates Band Pack