External oblique
Musculus obliquus externus abdominis · Zevní šikmý sval břišní
Muscles
Looks like
The outermost flat muscle on the side of the belly, its fibres running down and forward like hands in front pockets.
What it does
Twists and bends the trunk and squeezes the belly; its lower edge forms the inguinal ligament.
Keeping it well
Gradual training before twisting sports; a sudden sharp pain in the side while swinging or throwing is usually a strain that heals with rest.