Significant intervention effects were also observed for meeting exercise guidelines ( 150 min/wk ; odds ratio , 3.9 ; 95 % CI , 1.9-7 .8 ; P = .002 ) ; positive intervention effects were observed in the intervention group for cognitive functioning ( effect size : d , 0.34 ; 95 % CI , -0.02 to 0.70 ; P = .06 ) and depression symptoms ( effect size : d , -0.35 ; 95 % CI , -0.71 to 0.02 ; P = .06 ) .