title: Predicting aerobic versus resistance exercise using the theory of planned behavior.
abstract: 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.
  
  
  CONCLUSIONS
  Differences in the predictive validity of model constructs suggest potential differential intervention foci for aerobic versus resistance exercise.
authors.affiliation: Department of Psychology, Institute of Behavioral Science, University of Colorado, Boulder 80309-0345, USA. angela.bryan@colorado.edu
authors.forename: Angela D
authors.initials: AD
authors.lastname: Bryan
authors.forename: Courtney A
authors.initials: CA
authors.lastname: Rocheleau
mesh_terms: D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D015444:Exercise / Q000523:psychology*; D005120:Extraversion, Psychological; D005260:Female; D005500:Follow-Up Studies; D015438:Health Behavior; D006801:Humans; D008297:Male; D009042:Motivation; D010555:Personality Inventory; D013334:Students / Q000523:psychology; D014891:Weight Lifting / Q000523:psychology*