The primary outcome will be to measure spasticity with passive range of motion of the foot (pROM) by muscular extensibility and its traction reflex using goniometryIt will be assessed at baseline before the treatment, as well as after 3 weeks, 2 months, 3 months, after the washout period (3months), 3 months and 3 weeks, 5 months and 6 months, when the end the intervention.