2.2) Assessment 2: After 3 weeks of treatment only with the applications of magneto therapy, a new assessment will be equal to an evaluation made by an assessor blinded, who do not know which patients are exposed to placebo or not. After the third evaluation, all patients will continue with the sessions of magnetic therapy (placebo or not), but now associated with specific therapeutic exercises for the treatment of impingement syndrome of the shoulder. The assessment consists of two re-evaluation of all parameters previously in an evaluation.