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Health Educ Behav. 2012 Apr;39(2):152-8. doi: 10.1177/1090198111417621. Epub 2011 Dec 13.

Synergistic effects of planning and self-efficacy on physical activity.

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Department of Health Psychology, Freie Universit├Ąt Berlin, Berlin, Germany.


Many individuals are motivated to improve their physical activity levels but often fail to act on their good intention. This study examines the roles of planning and self-efficacy in the prediction of physical activity. A total of 290 participants (77% women, mean age = 41.9 years) were surveyed three times. Intentions, planning, and physical activity were specified as a mediator chain. Results reveal that intentions were partly translated into physical activity by planning. Self-efficacy moderated this mediation, reflected by a planning ├Ś self-efficacy interaction (p < .05) on physical activity accounting for 16% of the variance in behavior. If a person is self-efficacious, planning seems more likely to be translated into physical activity.

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