Seventy-three patients ( meanSD , @years ) with overweight ( body mass index ( BMI ) , @ ) and moderate or severe OSAS ( Apnea-Hypopnea Index , @ ) scheduled for CPAP prescription were randomized to a control group ( CPAP and advice on the association between weight and OSAS ) or an experimental group ( CPAP and a @-month behavioral medicine intervention targeting PA and EB ) .