Functional Electrical Stimulation (FES) is currently one of the most used technique for muscle rehabilitation in order to help the patient in the recovery of voluntary movement by controlling muscle contraction and functional recovery. A physiotherapist-patient system, such as the one used for this thesis, implies the presence of two subjects: the physiotherapist who performs a certain movement and the patient to whom the same movement is induced by electrostimulation. To obtain this result, the stimulation pattern derives from the analysis of the surface ElectroMyoGraphic (sEMG) signal, taken by the physiotherapist during the execution of the movement, which determines the amplitude of the FES impulse.