Inclusion Criteria:  Age between 18 and 65 years. Nonspecific pain in the lumbar region.  Exclusion Criteria:  Previous surgery in the lumbosacral spine. Osteoporosis. Needle phobia. Neurogenic pain with positive tests or negative symptoms. Red flags: cauda equina syndrome, sudden weight loss, fracture, cancer, infection or systemic diseases. Pregnancy. Physiotherapy intervention in the 4 weeks prior to the intervention.