Without the footbar to put the feet on, you can lie on a mat and place your legs in tabletop, then try to keep the pelvis level as you tap one foot down on the mat at a time. (womenshealthandfitness.com.au)
After a 4 hour testing session to determine if his treatment would be effective the largest curve in my spine changed by 10 degrees and my pelvis leveled out! (nwprc.com)