Inclusion Criteria:  Back-related leg pain (BRLP) consistent with the Quebec Task Force (QTF) classifications 2-4 (radiating pain into proximal or distal extremity with or without neurological signs). 18 years of age or older. Back-related leg pain severity of 3 or higher at all screening assessments (0 to 10 scale) Episode duration of 12 weeks or more Ability to read English fluently  Exclusion Criteria:  Spinal stenosis (QTF 7) Specific, non-mechanical causes of BRLP (QTF 11; e.g. infection, tumor) Contraindications to study interventions (e.g. spinal fracture (QTF 5)) Inflammatory conditions of the lumbar spine (QTF 11) Lumbar fusion Progressive neurological deficits Cauda equina syndrome Pregnancy, nursing Ongoing care from another healthcare provider for BRLP Severe unmanaged comorbid conditions (e.g. substance abuse, major depressive disorder, stage 3 hypertension).