The Theories of Reasoned Action and Planned Behavior Applied to Exercise: A Meta-analytic Update

in Journal of Physical Activity and Health
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Background:

Statistical reviews of the theories of reasoned action (TRA) and planned behavior (TPB) applied to exercise are limited by methodological issues including insufficient sample size and data to examine some moderator associations.

Methods:

We conducted a meta-analytic review of 111 TRA/TPB and exercise studies and examined the influences of five moderator variables.

Results:

We found that: a) exercise was most strongly associated with intention and perceived behavioral control; b) intention was most strongly associated with attitude; and c) intention predicted exercise behavior, and attitude and perceived behavioral control predicted intention. Also, the time interval between intention to behavior; scale correspondence; subject age; operationalization of subjective norm, intention, and perceived behavioral control; and publication status moderated the size of the effect.

Conclusions:

The TRA/TPB effectively explained exercise intention and behavior and moderators of this relationship. Researchers and practitioners are more equipped to design effective interventions by understanding the TRA/TPB constructs.

Downs is with the Dept of Kinesiology, The Pennsylvania State University, University Park, PA 16802-5701. Hausenblas is with the Dept of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL 32611-8205.

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