| Mediators of physical activity behavior change: Findings from a 12-month randomized controlled trial. | |
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MedLine Citation:
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PMID: 22149130 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Objective: To examine putative mediators of a 12-month motivationally tailored physical activity (PA) promotion intervention. Design: We randomly assigned 239 healthy, underactive adults (moderate-vigorous physical activity <90 min/week; mean age = 47.5 years; 82% women) to receive (a) print-based feedback, (b) phone-based feedback, or (c) contact control. Primary Outcome: PA at baseline, 6, and 12 months, as measured by the 7-Day Physical Activity Recall interview. Mediators: Four TransTheoretical Model constructs explicitly targeted by the intervention (i.e., self-efficacy, decisional balance, cognitive and behavioral processes of change), as well as four additional constructs linked to PA behavior change (i.e., social support, outcome expectancy, PA enjoyment, exercise-induced feelings). Results: Multivariate mediation analyses were used to analyze longitudinal PA outcomes. Changes in behavioral processes and one aspect of exercise-induced feelings (revitalization) satisfied both Action Theory (i.e., treatment effects on mediators) and Conceptual Theory (i.e., mediator effects on PA) tests at 6 and 12 months and emerged as statistically significant mediators of treatment effects on PA across delivery channels (ps <.014). Cognitive processes, self-efficacy, decisional balance, and social support for PA participation satisfied Action Theory tests at both 6 and 12 months, but failed Conceptual Theory tests. Delayed intervention effects were observed on other aspects of exercise-induced feelings, PA enjoyment, and outcome expectancies, but these variables failed mediation testing at 12 months. Conclusion: Findings are consistent with previous research illustrating the importance of behavioral processes of change, but also indicate that affective response to PA may warrant more attention as a potential target of behavior change programs. (PsycINFO Database Record (c) 2011 APA, all rights reserved). |
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Authors:
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George D Papandonatos; David M Williams; Ernestine G Jennings; Melissa A Napolitano; Beth C Bock; Shira Dunsiger; Bess H Marcus |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-12 |
Journal Detail:
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Title: Health psychology : official journal of the Division of Health Psychology, American Psychological Association Volume: - ISSN: 1930-7810 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8211523 Medline TA: Health Psychol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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