Axial rotation of the trunk has been reported as a major risk factor for low back dysfunction. However, a lack of biomechanical investigation exists that explains how twisting is accomplished with simultaneous asymmetric handling between the hip and the lumbar spine. We used a three-dimensional motion analysis to measure movements of the lumbar spine and bilateral hips. Decreased axial trunk range of motion might result in stiffened passive structures of the dominant hip joint. The function of the lumbar spine and hip joint might be altered based on the stiffened dominant side of the hip joint.
Volume 48 Number 8, 2011
Pages 1029 — 1036
Last Reviewed or Updated Friday, October 14, 2011 9:40 AM