Inclusion Criteria:  Low back pain > 3 months No exercises for last 6 months Non-specific LBP in its sub-acute & chronic phase  Exclusion Criteria:  Specific causes of LBP (disc herniation, lumbar stenosis, spinal deformity, fracture, spondylolisthesis), Central or peripheral neurologic signs Systemic illness (tumor and rheumatologic diseases), Psychiatric and mental deficits. Patients who had undergone operations within 6 months