Predicting change in exercise stage over a three-year period: an application of the theory of planned behavior
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ABSTRACT:
The purpose of the present study was to apply the theory of planned behavior to understand exercise stage change in older persons over a three year period. Participants (N=147) completed a mailed survey at baseline that assessed attitude, perceived behavioral control, subjective norm, intention, and stage; and a telephone interview three years later that assessed stage. Participants were classified into four major patterns of change: resisters (inactive at both time points), maintainers (active at both time points), adopters (inactive then active), and relapsers (active then inactive). Results showed that (a) initially sedentary participants who became active (adopters) had higher perceptions of control at baseline than those who remained sedentary (resisters), and (b) initially active participants who remained active (maintainers) had more positive attitudes, higher perceptions of control, and stronger intentions at baseline than those who became inactive (relapsers). Results were interpreted as supporting the utility of the theory of planned behavior for understanding exercise stage change in older persons.
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