Inclusion Criteria:  Chronic low back pain with or without irradiating pain (pain > 3 months) Low back pain is the dominant symptom, and Visual Analog Pain Scale (low back pain)>4 Normal cognitive function, voluntary participation Able to read and answer the questionnaires in English or Hungarian language  Exclusion Criteria:  Previous spinal surgery Untreated metabolic bone disease Active malignant disease Pregnancy Severe osteoporosis, fracture or posttraumatic deformity Spinal infection Neuromuscular disease Autoimmune disease Myelopathy Congenital spinal deformity Mental disorders Severe sciatica Severe spinal instability Refusing the study protocol