The external oblique muscle are situated on either side of the abdomen and aid in the twisting movement of the trunk and contract strongly when doing sit ups.

Origin

  • Lowest 8 ribs

Insertion

  • Front 1/2 of the iliac crest
  • Linea alba

Actions

  • Contraction of one side alone laterally bends the trunk to that side
  • and rotates the trunk to the other side
  • Compresses the abdomen and supports the abdominal viscera

Innervation

  • Ventral rami of thoracic nerves

Daily uses

  • Raking leaves

Example exercises

  • Twisting crunches or sit-ups
  • Sitting twist using a resistance band
  • Standing twist using a resistance band

How can I stretch it?

  • Side stretch

How can I strengthen it?

  • Twisting crunches
  • Medicine ball twists
  • Sitting twist with a resistance band
  • Standing twist with a resistance band

Neck and Back Muscles:

More Human Muscles: