Inclusion Criteria:  Age ranging between 18 to 55 years, all genders. Healthy subjects Moderate physical activity (evaluated by IPAQ questionnaire) Do not perform any exhausting exercise and do not drink alcoholic or caffeinated beverages during the time the work is performed.  Exclusion Criteria:  Subjects with trauma in the last three weeks or previous surgeries on the upper extremity, patients with pre-existing neurological or rheumatic conditions, pregnancy, medical history of epilepsy the convulsive event, subjects under analgesic drug treatment or have ingested drugs with central action in the last 72 hours.