ORIGIN

Lateral third of the inguinal ligament, inner rim of the iliac crest, inner surface of the costal cartlidges of the lower six ribs, and lumbar fascia

 

INSERTION

Crest of the pubis and the iliopectineal line, abdominal aponeurosis to the linea alba

 

ACTION

Forces expiration

 

INNERVATION

Intercostal nerves (T7-T12), iliohypogastric nerve (T12-L1), ilioinguinal nerve (L1)

 

PRIMARY JOINT

Rib cage (lower 6 ribs)

 

KEY STRENGTH TRAINING EXERCISES

Reverse curl ups

Prone plank

 

NEW STRENGTH TRAINING EXERCISES

Swissball jacknife

Stability ball bridge

 

COMMON INJURIES

Strain/stiffness

Tear