Inclusion Criteria:  Liver transplant candidates, accepted in the waiting list of the Surgical Department of Transplantation A.U.Th., General Hospital of Thessaloniki "Ippokratio".  Exclusion Criteria:  Recent (<12 months) Acute Myocardial Infraction Recent (<12 months) brain strokes Uncontrolled and/or untreated arrythmia Hepatic encephalopathy Bed-bound patient Liver Transplantation Death