swiss ball rock back and forth

Rock back-and-forth - Sit on the exercise ball with arms to the sides or on hips. Slowly do a pelvic tilt, pulling stomach muscles in and moving hips slightly toward the front to flatten the small of the back (reduce lordosis). Return to the neutral position on the exercise ball. Arch small of the back slightly and move hips slightly toward the back. Return to neutral position on the exercise ball. When comfortable with these movements on the exercise ball, do them continuously back and forth for 10 repetitions