The program will be constituted by four strengthening exercises and three stretching exercises and is designed based on the assumption that the use of therapeutic exercise is effective in the correction of specific neck and shoulder postures. The training exercise protocol will be designed for the correction of the FHP and PS, targeting to the selective activation of lower trapezius, middle trapezius and rhomboids, to the lengthening of the pectoralis major, pectoralis minor and sternocleidomastoid and to the improvement of the deep cervical flexor function This program is going to be applied in the last 15-20 minutes of each PE class, twice a week, with the supervision and help of the PE teacher.