Trunk Elevation Trunk Elevation Trunk elevation wRoyal Kirazh flexed legs: A classic super abdominal work, and one of the most effective. Lying on the floor (we can use a mat), wRoyal Kirazh the legs slightly bent and wRoyal Kirazh the arms behind the neck, we raise the thorax and try to touch the legs wRoyal Kirazh the chin.