title: Interaction of perceived neighborhood walkability and self-efficacy on physical activity.
abstract: OBJECTIVE
  Few social ecological studies have considered the joint effects of intrapersonal and environmental influences on physical activity. This study investigated the interaction of self-efficacy and perceived neighborhood walkability in predicting neighborhood-based physical activity and how this relationship varied by gender and body mass index.
  
  
  METHODS
  Data were derived from a cross-sectional investigation of environmental and psychosocial correlates of physical activity among adults (n = 585). Participants completed a detailed 7-day physical activity log booklet, along with a questionnaire that included measures of neighborhood walkability, self-efficacy, and several sociodemographic items. Factorial analysis of variance tests were used to examine the main effects of and interaction between walkability and self-efficacy.
  
  
  RESULTS
  In predicting neighborhood-based physical activity, significant interactions were observed between self-efficacy and neighborhood walkability for females (but not for males) and for overweight/obese participants (but not for healthy weight individuals). Women and overweight/obese individuals with low self-efficacy demonstrated substantially greater physical activity when living in a high walkable neighborhood.
  
  
  CONCLUSIONS
  Physical activity research and promotion efforts should take into account both environmental and personal factors and the interrelationships between them that influence active living.
authors.affiliation: Dept of Health Promotion, Education, and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Kaczynski
authors.forename: Jennifer
authors.initials: J
authors.lastname: Robertson-Wilson
authors.forename: Melissa
authors.initials: M
authors.lastname: Decloe
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D003430:Cross-Sectional Studies; D004779:Environment Design; D005260:Female; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D010465:Perception / Q000502:physiology*; D018794:Problem-Based Learning / Q000379:methods*; D020377:Self Efficacy; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D016138:Walking / Q000502:physiology*; D055815:Young Adult