title: Exercise adherence and intervention effects of two school-based resistance training programs for adolescents.
abstract: OBJECTIVE
  The aim of this study was to evaluate the efficacy and feasibility of two school-based RT programs to improve muscular fitness and body composition in adolescents.
  
  
  METHODS
  The study was conducted in Australia from July 2008 to June 2009. Participants [n=108, mean age (SD)=15.0 (0.7) years] were randomized to free weights (n=37) or elastic tubing (n=41) RT groups and a control group was recruited (n=30). Participants in the RT groups completed 2 sets of 10-12 repetitions on 10 exercises for 8 weeks. Waist circumference, body composition (bioelectrical impedance analysis) and muscular strength (bench press and leg press) were assessed at baseline and posttest.
  
  
  RESULTS
  Boys (p<0.001) and girls (p<0.01) in both RT groups improved their body composition over the study period. Boys in both RT groups significantly improved both upper and lower body strength and their improvements were significantly greater than changes observed in the control group. Girls in the free weights groups achieved larger improvements in lower body strength compared to the control group (p<0.05).
  
  
  CONCLUSIONS
  Free weights and elastic tubing RT are feasible and effective strategies for improving aspects of health-related fitness in adolescents.
authors.affiliation: School of Education, The University of Newcastle, Callaghan Campus, NSW 2308, Australia. David.Lubans@newcastle.edu.au
authors.forename: David R
authors.initials: DR
authors.lastname: Lubans
authors.forename: Cayenne
authors.initials: C
authors.lastname: Sheaman
authors.forename: Robin
authors.initials: R
authors.lastname: Callister
mesh_terms: D000293:Adolescent; D001315:Australia; D001823:Body Composition; D015444:Exercise / Q000502:physiology*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D053580:Muscle Strength; D010809:Physical Fitness; D015397:Program Evaluation; D055070:Resistance Training; D012574:Schools; D020377:Self Efficacy