title: Physiological and behavioural outcomes of a randomised controlled trial of a cognitive behavioural lifestyle intervention for overweight and obese adolescents.
abstract: OBJECTIVE
  This study evaluates the efficacy of the Choose Health program, a family-based cognitive behavioural lifestyle program targeting improved eating and activity habits, in improving body composition, cardiovascular fitness, eating and activity behaviours in overweight and obese adolescents.
  
  
  METHODS
  The sample comprised 29 male and 34 female overweight (n = 15) or obese (n = 48) adolescents aged 11.5-18.9 years (M = 14.3, SD = 1.9). Participants were randomly allocated to treatment or waitlist control conditions; waitlist condition participants were offered treatment after 6 months. DEXA-derived and anthropometric measures of body composition; laboratory-based cycle ergometer and field-assessed cardiovascular fitness data; objective and self-report physical activity measures; and self-report measures of eating habits and 7-day weighed food diaries were used to assess treatment outcome. Adherence to treatment protocols was high.
  
  
  RESULTS
  Treatment resulted in significant (p < .05) and sustained improvements in a range of body composition (body fat, percent body fat, lean mass) and anthropometric measures (weight, BMI, BMI-for-age z-score and percentiles). Minimal improvements were seen in cardiovascular fitness. Similar results were obtained in completer and intention-to-treat analysis. Poor adherence to assessment protocols limits conclusions that can be drawn from physical activity and dietary data.
  
  
  CONCLUSIONS
  Participation in the Choose Health program resulted in significant improvement in body composition. Longer-term follow up is required to determine the durability of intervention effects. Alternative approaches to the measurement of diet and physical activity may be required for adolescents.
authors: School of Health Sciences, RMIT University, Melbourne, Australia. Electronic address:leah.brennan@monash.edu.
authors: Leah
authors: L
authors: Brennan
authors: Australian Technology Network Centre for Metabolic Fitness, Australia.
authors: Jeff
authors: J
authors: Walkley
authors: School of Health Sciences, RMIT University, Melbourne, Australia.
authors: Ray
authors: R
authors: Wilks
authors: School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia.
authors: Steve F
authors: SF
authors: Fraser
authors: School of Medical Sciences, RMIT University, Melbourne, Australia.
authors: Kate
authors: K
authors: Greenway
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000293:Adolescent; D001823:Body Composition; D001825:Body Fluid Compartments; D015992:Body Mass Index; D001835:Body Weight; D002319:Cardiovascular System; D002648:Child; D003071:Cognition; D004032:Diet; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006801:Humans; D057194:Intention to Treat Analysis; D008019:Life Style; D008297:Male; D009765:Obesity / Q000178:diet therapy / Q000378:metabolism / Q000628:therapy*; D010809:Physical Fitness; D016896:Treatment Outcome; D061217:Weight Reduction Programs / Q000592:standards*