title: Does tailoring on additional theoretical constructs enhance the efficacy of a print-based physical activity promotion intervention?
abstract: OBJECTIVE
  To enhance a previously efficacious individually tailored physical activity (PA) promotion intervention by adding theoretical constructs to the tailored feedback.
  
  
  METHODS
  We randomly assigned 248 healthy, underactive (moderate to vigorous physical activity [MVPA] min/week < 90) adults (mean age = 48.8 years, SD = 10.0) to receive either (a) a theoretically tailored (based on 5 constructs from the transtheoretical model and social-cognitive theory [SCT]) print-based PA promotion intervention (print) or (b) the same theoretically tailored print-based PA promotion intervention plus enhanced tailoring addressing 5 additional SCT constructs (enhanced print).
  
  
  METHODS
  The 7-day physical activity recall administered at baseline, Month 6, and Month 12, with outcomes operationalized as percentage achieving 150 min/week of MVPA.
  
  
  RESULTS
  When controlling for covariates, there was a nonsignificant trend in favor of the enhanced print condition reflecting 46% and 50% greater odds of achieving 150 min/week of MVPA at Month 6 and Month 12, respectively.
  
  
  CONCLUSIONS
  Enhanced tailoring based on additional theoretical constructs may result in marginal improvements in physical activity outcomes.
authors.affiliation: Department of Community Health, Brown University, Providence, RI 02912, USA. david_m_williams@brown.edu
authors.forename: David M
authors.initials: DM
authors.lastname: Williams
authors.forename: George D
authors.initials: GD
authors.lastname: Papandonatos
authors.forename: Ernestine G
authors.initials: EG
authors.lastname: Jennings
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Napolitano
authors.forename: Beth A
authors.initials: BA
authors.lastname: Lewis
authors.forename: Jessica A
authors.initials: JA
authors.lastname: Whiteley
authors.forename: Beth C
authors.initials: BC
authors.lastname: Bock
authors.forename: Anna E
authors.initials: AE
authors.lastname: Albrecht
authors.forename: Shira
authors.initials: S
authors.lastname: Dunsiger
authors.forename: Alfred F
authors.initials: AF
authors.lastname: Parisi
authors.forename: Abby C
authors.initials: AC
authors.lastname: King
authors.forename: Bess H
authors.initials: BH
authors.lastname: Marcus
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001521:Behavior Therapy; D015444:Exercise / Q000523:psychology*; D005260:Female; D058015:Health Communication; D006293:Health Promotion; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D011582:Psychological Theory; D055815:Young Adult