Effects of Myofascial Release on Pain, Disability and Electromyography of Erector Spinae in Chronic Low Back Pain

Inclusion Criteria: * low back pain for more than 3 months Exclusion Criteria: * vertebra fractures * systemic disease (spondylitis, neoplasia, infectious, vascular, endocrine or metabolic disorders) * spinal surgery * advanced lumbar instability * osteoporosis (in advanced stage) * degenerative articular disease * acute soft tissue inflammation * rheumatoid arthritis * osteomyelitis * neuromuscular disease * lower limb musculoskeletal injuries * radiculopathy * cauda equine syndrome * myelopathy * stenosis * structural spine deformity (kyphoscoliosis...) * pregnancy * abundant menstruation * IUD carrier * mental disease * dermatologic disease * skin sensitivity * aneurysma * corticosteroids treatment * anticoagulant therapy * hypertension * diabetes * hemophilia * leucemia * rejection to manual contact