In a prospective pilot study , stable patients ( 79 % male , 57.6 6.7 years old ) with Child-Pugh class A or B cirrhosis ( mean Model for End-Stage Liver Disease score , 10 2.2 ) were randomly assigned to groups that received exercise training ( n = 9 ) or usual care ( controls , n = 10 ) at the University of Alberta Hospital in Canada from February through June 2013 .