fudge.01
frames- [ARG0 So many people *ICH*-2] [rel fudge] on [ARG1-on answers about exercise] , 0 the president 's council now uses specific criteria *-4 to determine what *T*-1 is considered *-3 vigorous : It must produce contractions of large muscle groups , must achieve 60 % of maximum aerobic capacity and must be done three or more times a week for a minimum of 20 minutes .