title: Psychosocial constructs and postintervention changes in physical activity and dietary outcomes in a lifestyle intervention, HUB City Steps, 2010.
abstract: BACKGROUND
  Although modifications to dietary and physical activity (PA) behavior can reduce blood pressure, racial disparities in prevalence and control of hypertension persist. Psychosocial constructs (PSCs) of self-regulation, processes of change, and social support are associated with initiation and maintenance of PA in African Americans; which PSCs best predict lifestyle behavior changes is unclear. This study's objective was to examine relationships among PSC changes and postintervention changes in PA and dietary outcomes in a community-based, multicomponent lifestyle intervention.
  
  
  METHODS
  This study was a noncontrolled, pre/post experimental intervention conducted in a midsized, Southern US city in 2010. Primarily African American adults (n = 269) participated in a 6-month intervention consisting of motivational enhancement, social support, pedometer diary self-monitoring, and 5 education sessions. Outcome measures included pedometer-determined steps per day, fitness, dietary intake, and PSC measures. Generalized linear mixed models were used to test for postintervention changes in behavioral outcomes, identify predictors of PSC changes, and determine if PSC changes predicted changes in PA and diet.
  
  
  RESULTS
  Postintervention changes were apparent for 10 of 24 PSCs (P < .05). Processes of change components, including helping relationships, reinforcement management, and consciousness raising, were significant predictors of fitness change (P < .05).
  
  
  CONCLUSIONS
  This article is among the first to address how measures of several theoretical frameworks of behavior change influence changes in PA and dietary outcomes in a multicomponent, community-based, lifestyle intervention conducted with African American adults. Findings reported identify PSC factors on which health behavior interventions can focus.
authors.affiliation: The University of Southern Mississippi, Department of Nutrition and Food Systems, 118 College Dr, Box 5172, Hattiesburg, MS 39406-0001. Email: Alicia.Landry@usm.edu.
authors.forename: Alicia S
authors.initials: AS
authors.lastname: Landry
authors.affiliation: USDA Agricultural Research Service, Baton Rouge, Louisiana.
authors.forename: Jessica L
authors.initials: JL
authors.lastname: Thomson
authors.affiliation: The University of Southern Mississippi, Department of Psychology, Hattiesburg, Mississippi.
authors.forename: Michael B
authors.initials: MB
authors.lastname: Madson
authors.affiliation: Virginia Polytechnic Institute and State University, Department of Human Nutrition, Foods and Exercise, Blacksburg, Virginia.
authors.forename: Jamie M
authors.initials: JM
authors.lastname: Zoellner
authors.affiliation: The University of Southern Mississippi, Department of Educational Studies and Research, Hattiesburg, Mississippi.
authors.forename: Richard S
authors.initials: RS
authors.lastname: Mohn
authors.affiliation: The University of Southern Mississippi, Department of Psychology, Hattiesburg, Mississippi.
authors.forename: Jeremy
authors.initials: J
authors.lastname: Noble
authors.affiliation: The University of Southern Mississippi, Department of Nutrition and Food Systems, Hattiesburg, Mississippi.
authors.forename: Carol L
authors.initials: CL
authors.lastname: Connell
authors.affiliation: The University of Southern Mississippi, Department of Nutrition and Food Systems, Hattiesburg, Mississippi.
authors.forename: Kathy
authors.initials: K
authors.lastname: Yadrick
mesh_terms: D000328:Adult; D001741:Black or African American / Q000523:psychology / Q000706:statistics & numerical data; D015992:Body Mass Index; D002947:Cities; D055812:Community-Based Participatory Research; D004032:Diet / Q000523:psychology* / Q000706:statistics & numerical data; D002149:Energy Intake; D005260:Female; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D006973:Hypertension / Q000175:diagnosis / Q000208:ethnology / Q000517:prevention & control; D008019:Life Style; D016014:Linear Models; D008297:Male; D008922:Mississippi; D062405:Motivational Interviewing; D009043:Motor Activity; D017063:Outcome Assessment, Health Care; D036301:Qualitative Research; D012307:Risk Factors; D012923:Social Class; D012944:Social Support; D016138:Walking / Q000502:physiology; D044465:White People / Q000706:statistics & numerical data