Chest · Skeletal muscle
Pectoralis Major (Chest Muscle)
The pectoralis major is the large fan-shaped muscle of the chest. It pulls the arm across the body and powers pushing movements like a press-up.
What it is
The pectoralis major is a broad, fan-shaped muscle covering the upper chest on each side, running from the breastbone and collarbone to the upper arm.
Where it is
The front of the chest, on each side, over the ribs.
What it does
Pulls the arm across the front of the body, and helps push and lift.
Everyday use
Pushing a heavy door, doing a press-up, and hugging all use the chest muscles.
When things go wrong
Common problems affecting the pectoralis major (chest muscle)
- Pectoral strain or tear (e.g. during heavy bench pressing)
- Muscle soreness after unaccustomed exercise
Education and reference only. This explains the anatomy in plain terms and is not a diagnosis. Sudden severe symptoms — such as crushing chest pain or collapse — are an emergency; call 999.
Looking after it
Keeping it healthy
Warming up, balancing chest and back strength, and increasing weights gradually protect the chest muscles.
Did you know?
An interesting fact
The pectoralis major is one of the main muscles worked by the press-up and the bench press.
Answers
Pectoralis Major (Chest Muscle): frequently asked questions
What does the pectoralis major do?
It is the large chest muscle that pulls the arm across the body and powers pushing movements like press-ups.
Related muscles
Explore the chest
Sources
Where this is drawn from
- NHS — Muscles and movement
- Gray's Anatomy for Students
- TeachMeAnatomy — muscular system
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