Inclusion Criteria:  Gender: male and female Age: 35-85 years include Entry into the hospital rehabilitation program lasting at least 5 days following hip replacement surgery Absence in history of neurological or psychiatric disorders. Signature of the Informed Consent and consent to collaborate in all the procedures of the study  Exclusion Criteria:  Presence of severe neurological / psychiatric pathologies to sign the Informed Consense of serious cardiological pathologies that can compromise patient safety of Pace Maker or spinal cord stimulators or other subcutaneous electronic instruments of active tumors in the treatment area