This tried-and-true ab exercise will target all your abdominal muscles.
- Start on the floor resting on your forearms and knees.
- Step your feet out one at a time, coming into a plank position.
- Contract your abs to prevent your booty from sticking up or sinking. Your spine should be parallel to the floor, with your abs pulling toward the ceiling.
- Hold 30 seconds, and work your way up to one minute as you get stronger.