Sixty subjects will be randomized (computer application) into three groups: Intervention Group, Placebo Group and Control Group. All the three groups receive the same protocolized treatment of physiotherapy and additionally. Additionally, the Intervention Group receives six sessions (two sessions in a week during three weeks) of real DF and the Placebo Group receives six sessions (two sessions in a week during three weeks) of sham DF. The Control Group receives the protocolized treatment of physiotherapy only.