Rectus Abdominis

Rectus Abdominis is the most superficial of the abdominal muscles. It is this muscle which forms the six-pack shape!

Origin

  •   Crest of the pubis.
  •   Pubic symphesis.

Insertion

  • Xiphoid process (base of the sternum).  
  • 5th,6th and 7th costal cartilages.  

Actions

  • Flexes lumbar spine.  

Innervation

  • Ventral rami of thoracic nerves.

Daily uses

  • Moving from lying to sitting.  

Example strengthening exercises

Example stretches

Related injuries

Related muscles