Patients will receive 10 sessions for two weeks. The duration of each session will be of approximately one hour. Participants will receive treatment with Interferential current therapy plus a program of therapeutic exercise focused on the neck region

Patients will receive 10 sessions for two weeks. The duration of each session will be of approximately one hour.This group will only receive the same therapeutic exercise program.

The Interferential Current Program will be based on a bipolar application using the Sonopuls 692 device (Enraf Nonius, Rotterdam, The Netherlands). The current parameters will be: a) 4000Hz carrier frequency; and b) 60 Hz AMF with a modulation frequency of 90 Hz. The intensity of the current will be adapted to the sensitivity of each patient.

The Therapeutic Exercise Program will be applied by a physiotherapist and will consist of:

1. Ergonomic advices on reducing repetitive movements and/or maintained positions
2. A protocol of active physiotherapy for neck and shoulder muscles. This protocol will include: active stretching exercises; isometric muscle strengthening exercises; reeducation of the ocular and neck muscles with control retraining exercises

Participants will rate the intensity of their neck pain at rest on an 11-point numeric pain rating scale, where 0 is no pain and 11 maximum pain. The subjects will be ask to indicate the pain levels that they experienced before treatment and after treatment.

The Neck Disability Index (NDI) will be used in the Spanish version to measure level of disability of the neck area during the daily life activities.

where under 9 denotes No Disability; from 10 to 29 denotes Slight Disability; from 30 to 49 denotes Moderate Disability; from 50 to 69 denotes Severe Disability and more tan 70 denote Complete Disability.

The secondary outcome measure will be the active cervical range of motion assessed with the CROM device (Performance Attainment Associates, Lindstrom, MN). The measurements will be made separately for each direction and in a standard sequence: flexion, extension, right lateral flexion, left lateral flexion, right rotation and left rotation. Two measurements will be recorded for each movement and the average of the two measurements will be used in the analysis of results