"The presence of a Pelvic Tilt can cause the joints of the lumbar spine, the sacrum and the pelvis to reach the point where they, too, can no longer move in a certain direction. A “locked” pelvis results. The symptoms of C/RLBP manifest depending upon three factors: the amount of Pelvic Tilt, the age of the patient and how stiff or inflexible the patient is with regard to his/her muscles."
http://www.sievertclinic.com/html/services/PelvicTilt.jpg
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