title: Exercise and diet determinants of overweight women participating in an exercise and diet program: a prospective examination of the theory of planned behavior.
abstract: The purpose of this study was to examine prospectively the ability of direct and belief-based measures of the theory of planned behavior (TPB) constructs to predict exercise and diet intention and behavior of overweight women. Participants were 117 overweight, community-dwelling women and university students enrolled in a 4-week exercise and diet program. Participants completed baseline measures of demographic characteristics and the TPB constructs. Their exercise and diet adherence were also recorded. We found that: (1) the direct measure of perceived behavioral control (PBC) predicted exercise intention, (2) the direct measures of instrumental attitude, subjective norm, and PBC predicted diet intention, and (3) none of the direct or belief-based measures of the TPB constructs predicted 4-week exercise or diet behavior. Furthermore, several beliefs were associated with the direct measures of attitude, subjective norm, PBC, and intention. Implications of these results for designing exercise and diet interventions with overweight women are discussed.
authors.affiliation: Department of Kinesiology, Louisiana State University, 112 HPL Field House, Baton Rouge, 70803, USA. rgardner@lsu.edu
authors.forename: Rebecca Ellis
authors.initials: RE
authors.lastname: Gardner
authors.forename: Heather A
authors.initials: HA
authors.lastname: Hausenblas
mesh_terms: D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D032763:Behavior Control / Q000379:methods / Q000523:psychology*; D004038:Diet, Reducing / Q000523:psychology*; D015444:Exercise / Q000523:psychology*; D005247:Feeding Behavior / Q000523:psychology*; D005260:Female; D005544:Forecasting; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D009042:Motivation; D050177:Overweight; D010349:Patient Compliance; D011446:Prospective Studies