External oblique
Core
- Origin
- Outer surfaces of ribs 5 to 12
- Insertion
- Iliac crest, linea alba and pubic tubercle (via its aponeurosis)
- Action
- Rotates the trunk to the opposite side and bends it to the same side; compresses the abdomen
The outermost side abdominal muscle. Its fibres run like hands in front pockets. Twisting and anti-rotation work trains it; its flat tendon sheet (not shown) covers the six-pack.