RESULTS	There were nonsignificant trends toward improvement in 6-min walk distance ( 55 47 vs -13 64 m , P = .09 ) , Center for Epidemiologic Studies Depression Scale ( -9.0 9.1 vs -2.8 4.3 , P = .20 ) , and University of California , San Diego Shortness of Breath score ( -7.8 3.5 vs -1.2 11 , P = .40 ) .\