title: Behavioral changes after a 1-yr exercise program and predictors of maintenance.
abstract: OBJECTIVE
  Public health strategies attempt to stimulate participation in physical activity, aiming at permanent behavior change. We assessed the sustained effect of participating in an exercise program on physical activity behavior 1 yr after completion of the program. Furthermore, we aimed to identify factors that predict sustained exercise participation.
  
  
  METHODS
  Previously low-active, postmenopausal women originally participating in an exercise intervention study (the Sex Hormones and Physical Exercise study) were recontacted 1 yr after finishing the study. Their current level of physical activity was assessed by the Modified Baecke Questionnaire. MET-hours per week spent on at least moderate-intensity activities were calculated and used to assess compliance to the international physical activity recommendation. Multivariable linear regression analysis was applied to investigate which factors predict a higher level of physical activity in the intervention group 1 yr after the study.
  
  
  RESULTS
  Participation in the Sex Hormones and Physical Exercise study resulted in an increased level of physical activity in both the intervention (median at baseline and at 12 months = 4.9 and 19.8 MET x h x wk(-1), respectively) and the control groups (median at baseline and at 12 months = 4.3 and 5.8 MET x h x wk(-1), respectively). Although the intervention group did not maintain the high physical activity level achieved during the study, 1 yr later they remained more active than the control group (median = 12.1 and 7.9 MET x h x wk(-1), respectively, P = 0.04). Age, baseline activity, and employment were the strongest predictors of the physical activity level in the intervention group 1 yr after finishing the study.
  
  
  CONCLUSIONS
  Sustained changes in physical activity behavior in previously low-active postmenopausal women are feasible after participation in a 1-yr exercise program.
authors.affiliation: Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.
authors.forename: Emmy M
authors.initials: EM
authors.lastname: Hertogh
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Vergouwe
authors.forename: A Jantine
authors.initials: AJ
authors.lastname: Schuit
authors.forename: Petra H M
authors.initials: PH
authors.lastname: Peeters
authors.forename: Evelyn M
authors.initials: EM
authors.lastname: Monninkhof
mesh_terms: D000368:Aged; D015444:Exercise; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016014:Linear Models; D008875:Middle Aged; D009042:Motivation; D009426:Netherlands; D017698:Postmenopause; D040242:Risk Reduction Behavior; D011795:Surveys and Questionnaires