 Exclusion Criteria: Patients will be excluded if they have heart failure NYHA class III and IV, pectoris angina andor acute myocardial infarction in the last 3 months, pacemaker or implantable cardioverter defibrillator, stage 4 or 5 chronic renal failure GFR 30ml min 1.73 m2, organic or cognitive impairment that unable the patients to ingest liquids, cirrhosis, and not compensated thyroid dysfunction. 