Potential moderators and mediators of intervention effects in an obesity prevention program for adolescent boys from disadvantaged schools

Journal of Science and Medicine in Sport
David R LubansRobin Callister

Abstract

The purpose of this study was to explore potential moderators and mediators of intervention effects in the Physical Activity Leaders (PALs) obesity prevention program for adolescent boys from disadvantaged secondary schools. Group randomized controlled trial. One hundred adolescent boys (mean age=14.3 (0.6) years) from four schools were randomized to the PALs intervention or a control group for the 6-month study period. The primary outcome was change in BMI and secondary outcomes were physical activity assessed using pedometers and constructs from Social Cognitive Theory (SCT) assessed using a questionnaire. Moderation analyses revealed a significant weight status interaction for BMI (p=0.04), indicating stronger intervention effects for youth classified as overweight/obese at baseline. The intervention had a significant effect on resistance training self-efficacy (p<0.001), but none of the SCT constructs satisfied the criteria for mediation. The number of intervention sessions attended was associated with changes in BMI (r=-0.38, p=0.001), resistance training self-efficacy (r=0.42, p<0.001) and physical activity behavioral strategies (r=0.26, p=0.018). Changes in BMI were also associated with changes in resistance training sel...Continue Reading

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Citations

May 30, 2013·The International Journal of Behavioral Nutrition and Physical Activity·Narelle EatherDavid R Lubans
Apr 22, 2015·Obesity Reviews : an Official Journal of the International Association for the Study of Obesity·Y WangJ Segal
Jan 13, 2015·Preventive Medicine·Patti-Jean NaylorHeather A McKay
Sep 21, 2016·International Journal of Environmental Research and Public Health·Michal BronikowskiAgata Glapa
Jan 3, 2018·Health Education Research·Mohammad BagherniyaMohammad Safarian
Apr 14, 2017·British Journal of Sports Medicine·Ryan E RhodesRonald Plotnikoff
Jul 25, 2019·The Cochrane Database of Systematic Reviews·Tamara BrownCarolyn D Summerbell
Mar 3, 2020·Pediatric Research·Lorraine B RobbinsFujun Wen
Jan 21, 2019·Journal of Functional Morphology and Kinesiology·Giseli MinattoMichael J Duncan
Apr 22, 2019·Behaviour Research and Therapy·Eric SticePaul Rohde

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