title: Psychosocial and environmental influences on physical activity and health outcomes in sedentary women.
abstract: OBJECTIVE
  To develop a model of psychosocial and environmental influences on physical activity and psychophysiological health outcomes in women.
  
  
  METHODS
  A structural equation model was evaluated. Variables included 13 predictors (perceived benefits to exercise, self-efficacy, goal setting, restructuring plans, relapse prevention, social support, work hassles, community hassles, family hassles, age, race, income, and education), two mediator variables assessing physical activity (performance, physical activity level), and three health outcome variables (body size, vigor, and fatigue).
  
  
  METHODS
  A cross-sectional sample of 198, self-described sedentary women aged 30-60 years completed several paper-and-pencil tests, after which they were assessed physiologically by means of performance on a 1-mile walk, BMI, and percentage of body fat measurements.
  
  
  RESULTS
  Overall, the model showed good fit. Self-efficacy, age, race, and income correlated with physical performance, and restructuring plans, relapse prevention, and age related to physical activity level. Performance was inversely correlated with body size, and physical activity level was directly related to perceived vigor.
  
  
  CONCLUSIONS
  Findings indicate that psychosocial determinants are important factors in understanding physical activity and psychophysiological health, and thus they should be incorporated into intervention programs focused on increasing physical activity and improving health outcomes in women.
authors.affiliation: Center for Health Research, Wayne State University, Detroit, MI, USA. m.nies@wayne.edu
authors.forename: Mary A
authors.initials: MA
authors.lastname: Nies
authors.forename: Trace C
authors.initials: TC
authors.lastname: Kershaw
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D006293:Health Promotion; D006801:Humans; D016013:Likelihood Functions; D008875:Middle Aged; D008962:Models, Theoretical; D012931:Social Environment; D016387:Women's Health