title: An Internet-based intervention for promoting and maintaining physical activity: a randomized controlled trial.
abstract: OBJECTIVE
  To evaluate the efficacy of a Social Cognitive Theory-based Internet intervention designed to promote and maintain leisure-time physical activity in university-aged female students in Thailand.
  
  
  METHODS
  The 3-month intervention was delivered through a website and e-mails with a follow-up evaluation 3 months after the end of the intervention. Female students (N = 220) were allocated to 4 parallel groups.
  
  
  RESULTS
  Significant increases in steps/ day, weekly leisure-time activity score, self-efficacy, outcome expectations, and self-regulation, and reduced resting heart rate were observed at the end of the intervention. With the exception of resting heart rate, the intervention effects on these variables also remained at the follow-up.
  
  
  CONCLUSIONS
  The Internet intervention program was effective in promoting and maintaining leisure-time physical activity in university-aged female students.
authors.forename: Sonthaya
authors.initials: S
authors.lastname: Sriramatr
authors.forename: Tanya R
authors.initials: TR
authors.lastname: Berry
authors.forename: John C
authors.initials: JC
authors.lastname: Spence
mesh_terms: D000293:Adolescent; D034742:Electronic Mail; D015444:Exercise / Q000502:physiology; D005260:Female; D006293:Health Promotion / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D020407:Internet; D007899:Leisure Activities; D008962:Models, Theoretical; D010101:Oxygen Consumption; D013785:Thailand; D055815:Young Adult