A double-blind clinical trial will be developed in a sample of 80 subjects with chronic low back pain. Patients in the experimental group will receive electrical dry needling at the active myofascial trigger points (PGM) of the quadratus lumbar, multifidus, and iliocostal muscles (following the PGM maps described by Travell and Simons). The technique will be performed using needle electrodes, the generated current will be produced by a TENS device with a frequency of 2 Hz and a pulse width of 250 μs, during 30 min of application. The therapeutic intervention will be 1 weekly session for a total of 6 weeks.~The control group will perform an ischemic compression technique in active PGM with a time between 20 seconds and 1 minute until pain inhibition is achieved, and finally, analytical stretching will be carried out on the quadratus lumbar, multifidus and iliocostal muscles. The treatment will consist of 1 weekly session for 6 weeks, in addition they will be provided with a training dossier on postural education in their activities of daily life.~A baseline assessment of the primary and secondary outcome measures will be carried out before randomization of the participants to the different groups, an immediate post-treatment assessment (1 day after the last intervention) and an assessment two month after the end of the intervention ( short-term follow-up).~The objectives of this study are to compare the repercussions of dry electropuncture versus ischemic compression in active PGM plus stretching in terms of pain, functionality, mobility of the spine, and quality of life in patients with non-specific chronic low back pain; and analyze the impact on active myofascial trigger points in terms of pressure tolerance threshold.
The main objective of this study is to determine the efficacy of electrical dry needling versus ischemic compression, analytical stretching and postural habits educational dossier in active myofascial trigger points in patients with chronic non-specific low back pain.