 Pathology of the rotator cuff and subacromial bursa is considered to be the principal cause of pain and symptoms arising from the shoulder. Physiotherapy specialists often disagree about which type of exercise is most appropriate. Manual Physiotherapy combined with guided exercise is a commonly applied clinical treatment, but no proof of its effectiveness has been shown. Clinical trials comparing results of treating subacromial syndrome of the shoulder with guided self-treatment and conventional physiotherapy yielded a slightly higher improvement, basically because patients suffered from chronic tendinitis and the treatment period lasted only two weeks. That is the reason why the investigators propose a long-term follow-up study and a more complete assessment of effectiveness of the exercise prescribed to improved this pathology. 