Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Positional malalignment of the sacroiliac joint is a proposed mechanism of non-specific low back pain and a risk factor for lower extremity injury due to theoretical effects on hip range of motion. The Postural Restoration Institute™ (PRI) has introduced novel techniques for assessment and correction of these positional malalignments. Twenty-four subjects displaying a left anterior innominate rotation, as defined by the PRI, participated in two data collection sessions: a control session and an intervention session, where each subject completed a three-exercise pelvic repositioning series. Sagittal and transverse innominate rotation, measured by palpation-digitization, and hip range of motion were collected at three time-points in each session: before intervention, after intervention, and after walking one half-mile. Two-way repeated measures ANOVAs were used to examine interaction of session and time-point. A significant interaction (p = .000) between session and time-point was seen in left adduction range of motion and left total arc frontal plane range of motion. No interaction was observed in the sagittal or transverse innominate rotation angles. This finding supports the PRI’s claim that left adduction range of motion can be increased through use of their repositioning series and provides support for clinical use of this technique in the treatment of hip and low back pain.