Targets lower abs Hang from a pullup bar with your hands shoulder-width apart and your hips centered under your body so there's a straight line from your hands to the bottom of your hips (A). Keeping your legs and back straight and using a slow, controlled motion, raise your legs until they're parallel to the floor (B). Slowly lower your legs. That's one rep. Do four to six. Feeling extra Barnumesque? Try to raise your feet above 90 degrees (C). Perfect Form As you raise your legs, don't swing them or let momentum do the work. Concentrate on keeping your butt down, as if you're sitting on a chair.