This is a great exercise for working your deepest abdominal muscles. Repeat the exercise three times.
The Roll-Down: Sit tall with your knees bent and your feet on the mat. Set your legs hip-width apart. Place your hands behind your thighs, keeping your elbows wide. Inhale and start to roll back on the mat, curling your pelvis under and pressing your lower back into the floor. Stop this roll halfway down with your arms nearly straight. Hold this position for 3 breaths, deepening your abs each time you exhale, and then raise yourself back to the start position. Repeat this exercise 3 times. This is a great exercise for working your deepest abdominal muscles.