Inclusion Criteria:  18 years old or older subjects with hemiparesis in the upper limb after stroke, which have been referred to the Rehabilitation Unit of the Reina University Hospital. Unilateral paresis Cognitive ability to assimilate and actively participate in the protocol of evaluation and treatment  Exclusion Criteria:  Very severe proximal spasticity: Ashworth > 3. Psychiatric illness (including post-stroke depression). Cognitive impairment. Inability to provide informed consent. Other severe medical problems. Severe hemi-spatial neglect or anosognosia involving the affected arm. Pacemakers Pregnant women. Skin ulcers. Peripheral neuropathies. Edema of the affected forearm and / or hand. Severe pain.