Lay down on your back a soft surface, the feet are on the floor. Ask a partner or use some other help (barbell, etc.) to keep them fixed, your hands are behind your head. From this position move your upper body up till your head or elbows touch your knees. Do this movement by rolling up your back.

Το διάγραμμα εμφανίζει τους μύς με την μεγαλύτερη δραστηριότητα σε αυτήν την άσκηση