It consists in a home rehabilitation program. Patients will recieve electroanalgesia with TENS and an exercise program following the McKenzie method. At first and second sessions, patients will be instructed on how to use electroanalgesia and how to perform the exercises. Then, patients will perform the therapy at home. Patients will perform the treatment 3 times per week, for 4 weeks, with a total of 24 sessions

It consists in a support system for the treatment of chronic low back pain based on web technologies. The system can register a subject and provide a treatment of electroanalgesia and exercise through the Mckenzie method. Video applications of electroanalgesia and exercises will be shown to patients who use their computer or mobile device to access the platform through the Internet. The treatments will be recommended by the system based on the database that is configured to accommodate the application of electroanalgesia and McKenzie exercises based on the diagnosis according to the McKenzie method.patients will perform the treatment 3 times per week, for 4 weeks, with a total of 24 sessions

It consists in a home rehabilitation program performing electroanalgesia and an exercise program following the Mckenzie method. Patients will be instructed in the use of the TENS device using 5x9cm electrodes at the bilateral paravertebral level, the patients that present radicular pain, the electrodes will be placed in the path of the affected nerve. The realization of exercises will be through the application of an Mckezie protocol. The duration will be the same as that used to carry out the Mckenzie protocol. Mckenzie exercises are designed to make changes in the internal components periarticular of the spine.

The extent to which participants who have received the intervention through a web application consider that the content and support materials (web application and initial learning sessions) are appropriate and satisfactory to obtain the expected results.The extent to which the physiotherapists who have administered the intervention consider that the training, content and support materials are appropriate.Brief questionnaire developed for this trial* 10-items Patients rate their acceptability and demand of treatment received and trial participation, including the burden of outcome measure completion. Measured with 10-point numeric rating scales ranging from not at all satisfactory to extremely satisfactory

The extent to which participants believe that their eligibility, outcome measures, follow-up and intervention by the physiotherapist have been satisfactory.

The extent to which physiotherapists who have participated in the trial consider recruitment, outcome measures, evaluation follow-ups and appropriate and satisfactory intervention procedures.Brief questionnaire developed for this trial* 4-items Measured with 10-point numeric rating scales ranging from not at all helpful to extremely helpful

The extent to which the content of the e-health intervention, support materials and learning classes should be modified to improve their acceptability and implementation for a future definitive trial The extent to which recruitment, follow-up procedures and the number and outcome measures should be modified during / at the end of the trial to improve its acceptability and implementation for a definitive future trial.Brief questionnaire developed for this trial* 11-items Measured using yes/no responses

This is a self-reported questionnaire consisting in 24 items reflecting limitations in different activities of daily living attributed to low back pain including walking, vending over, sitting, lying down, dressing, sleeping, self-care and daily activities.Ranging from 0 points- better to 24 points- worse disability