Inclusion Criteria:  Belonging to the Acquired Brain Injury Association of Cádiz Presence of spasticity in the biceps brachii and soleus muscles confirmed by the modified Ashworth Scale and modified Tardieu Scale. Patients who are standing and walking at least with technical assistance and / or supervision. Patients with acquired brain damage and with spastic hemiparesis with a chronic evolution of more than 12 months.  Exclusion Criteria:  Presence of infections. Other diagnosed diseases that prevent aquatic physiotherapy treatment, such as uncontrolled diabetes or dyspnea at rest. Have received aquatic therapy treatment in the six months prior to the study with the methods developed in the study (Halliwick or Watsu).