Inclusion Criteria for CLBP subjects:  Adults aged between 18 and 50 years. Suffering from low back pain for at least three months and referred by an orthopedic doctor or general physician. Enough physical autonomy to participate in the physical activities required by the study.  Exclusion Criteria CLBP subjects:  Low back pain patients with radiculopathy, post fractures, stenosis and history of tumors, cauda equina syndrome and infection. Patient under antidepressive medication Inclusion Criteria for Asymptomatic subjects Age 18 years and above, Either gender.  Exclusion Criteria for Asymptomatic subjects  H/o previous lower back injury. H/o lower limb or trunk pathology. Presence of deformity, or condition that may alter motor control. History of inflammatory, infectious disease and malignancy in the spine Patient under anti depressive medication