Pectoralis Major
The pectoralis major is the broad, fan-shaped muscle covering the front of the chest; it pushes the arm towards the front of the body and rotates it inwards. It is the main source of force in pushing movements.
| Location | The front of the rib cage; running from the collarbone, breastbone and ribs to the upper arm bone |
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| Function | Bringing the arm across the front of the body (horizontal adduction), rotating it inwards and producing pushing force |
| Role in daily life | Pushing doors, steering movements, hand support when getting up from the floor, embracing and carrying |
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| Related exercises |
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| Common misconception | Chest training is thought to be only about appearance, and to be unnecessary for women who train; in fact pushing strength is functional for everyone, and chest exercises support daily capacity regardless of sex. |
What does the fan shape give?
The fibres begin at the collarbone, the breastbone and the ribs, and come together at a single point on the upper arm bone. This fan arrangement lets the arm be pushed powerfully from different angles: the upper fibres work more in an upward push, the middle fibres in a straight push, the lower fibres in a downward push. Changing the angle of the push therefore emphasises different regions of the same muscle.
What it does in daily life
Pushing a heavy door, steering a shopping trolley, supporting yourself with your hands as you get up from the floor, and squeezing something in an embrace are the everyday tasks of the pectoralis major. Maintaining pushing strength with age matters particularly for floor mobility, the ability to get down to the floor and back up again.
Steps for training it
The ladder of the pushing pattern trains this muscle at every level: the road that starts with the Wall Push-Up runs through the Incline Push-Up to the full push-up. For those who want to work with weights, the Dumbbell Bench Press is the main tool.
Related terms: Push-Up, Dumbbell Bench Press, Triceps, Deltoid