The Serratus anterior muscle is used in activities which draw the scapula forwards. It is used strongly in push-ups and bench presses. Winged scapula is an indicator of having a weak Serratus anterior.

 Origin

  • Upper nine ribs at the side of the chest

Insertion

  • Costal aspect (side articulating with the ribs) of the medial border of the scapula

Actions

  • Scapula protraction
  • Rotation of the scapula upwards

Innervation

  • Long thoracic nerve

Daily uses

  • Reaching up to open a high window

How can I strengthen it?

Shoulder Girdle Muscles:

More Human Muscles: