Then, with the block centered and the sacrum fully supported, the supported bridge pose may help to reduce symptoms associated with low back disk problems. This is because the supported bridge pose places the low back in extension, which has been shown to relieve symptoms associated with intervertebral disk problems. 1 Warming up with the pelvic tilt will prepare the muscles, allowing an approximation of the position of extension in the low back when in the supported bridge pose.
Bibliography
1 Kisner, Carolyn, M.S. P.T. and Colby, Lynn Allen, M.S. P.T. Therapeutic Exercise Foundations and Techniques. 4th ed. 2002. F.A. Davis Company. Philadelphia, PA. p.644.

