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Predicting aerobic versus resistance exercise using the theory of planned behavior.

OBJECTIVE
To test the theory of planned behavior (TPB) in aerobic versus resistance training in a prospective design. Relationships between TPB variables, extroversion, and perceived health were examined.


METHODS
College students (210) completed an initial measurement and a 3-month follow-up assessment. Reasons for exercising were assessed.


RESULTS
TPB variables, extroversion, and perceived health collectively accounted for substantial variance in aerobic (19%) and resistance exercise (40%). Reasons for exercise included physical, psychological, and social concerns.


CONCLUSION
Differences in the predictive validity of model constructs suggest potential differential intervention foci for aerobic versus resistance exercise.