 Although it is known that chronic low back pain CLBP have a multifactorial etiology, the investigations about it are mostly specific to each investigation area, making difficult to understand this complex condition. The purpose of the study was to investigate CLBP from a multidisciplinary approach, analyzing biomechanical, morphological and inflammatory parameters aiming to compare the influence of two strength training protocols, one of low intensity and low volume LIT and one of high intensity and high volume HIT. In both experiments, pain intensity and level of functional disability were analyzed by analogue scale of pain and Oswestry Index, Ground Reaction Forces GRF - AMTI BP600900 - 2000 force plate, kinematics of lower limbs Inertial Sensors by Noraxon and electromyography of the rectus abdominis, external oblique, lumbar multifidus, medial gluteus, vastus lateralis and biceps femoris muscles TelemyoDTS during gait and sit-to-stand, inflammatory cytokines by Multiplex in blood samples and cross-sectional area CSA of the lumbar multifidus by ultrasound imaging. 