Effectiveness of Monopolar Dielectric Diathermy by Radiofrequency and Supervised Therapeutic Exercise in Pain, Functionality, Mobility of the Spine and Quality of Life of Patients With Non-specific Chronic Low Back Pain.

After randomization, participants will be assigned to the experimental group (8 sessions of monopolar dielectric diathermy by emission of radiofrequency combined with 8 sessions of supervised therapeutic exercise) or to the control group (8 sessions of supervised exercise). The number of participants will be identical between the groups. The randomization sequence will be performed by the principal investigator. The number of participants for each group will be 30. The results of the random assignment will be sealed in opaque envelopes before being delivered to the participants. The outcome assessor and study statistician will be blinded throughout the entire process. A baseline assessment of the primary and secondary outcome measures will be performed before randomization of the participants to the different groups, an immediate post-treatment assessment (1 day after the last intervention) and an assessment two months after the end of the procedure. intervention (follow-up).