David R Lubans1, Philip J Morgan2, Robin Callister3, Clare E Collins4. 1. School of Education, The University of Newcastle, New South Wales, Australia. Electronic address: David.Lubans@newcastle.edu.au. 2. School of Education, The University of Newcastle, New South Wales, Australia. 3. School of Biomedical Sciences, The University of Newcastle, New South Wales, Australia. 4. School of Health Sciences, The University of Newcastle, New South Wales, Australia.
Abstract
PURPOSE: The objective of this study was to evaluate the impact of a school-based intervention (Program X) incorporating pedometers and e-mail support on physical activity, sedentary behavior, and healthy eating in adolescents. METHODS: A randomized control trial was used to evaluate the impact of the Program X intervention. Six schools (N = 124 participants; mean age 14.1 +/- .8 years) were randomized to intervention or control conditions for the 6-month study period. Objectively recorded physical activity (mean steps/day), self-reported sedentary behavior, and dietary habits were measured at baseline and at 6-month follow-up and intervention effects were assessed using repeated-measures analysis of variance and chi(2) tests. RESULTS: Participants in the intervention group increased their step counts by 956 +/- 4107 steps/day (boys) and 999 +/- 1999 (girls). Repeated-measures analysis of variance revealed significant group-by-time interactions for boys (F = 7.4, p = .01, d = .80) and girls (F = 29.6, p <.001, d = 1.27) for mean steps/day. The intervention significantly decreased the number of energy-dense/low-nutrient snacks consumed by boys (chi(2) = 4.0, p = .043) and increased the number of fruit serves among girls (chi(2) = 4.8, p = .028). The intervention did not have a statistically significant effect on sedentary behavior. CONCLUSION: A school-based intervention incorporating physical activity monitoring using pedometers and e-mail support was successful in promoting physical activity and selected healthy eating behaviors in adolescent boys and girls.
RCT Entities:
PURPOSE: The objective of this study was to evaluate the impact of a school-based intervention (Program X) incorporating pedometers and e-mail support on physical activity, sedentary behavior, and healthy eating in adolescents. METHODS: A randomized control trial was used to evaluate the impact of the Program X intervention. Six schools (N = 124 participants; mean age 14.1 +/- .8 years) were randomized to intervention or control conditions for the 6-month study period. Objectively recorded physical activity (mean steps/day), self-reported sedentary behavior, and dietary habits were measured at baseline and at 6-month follow-up and intervention effects were assessed using repeated-measures analysis of variance and chi(2) tests. RESULTS:Participants in the intervention group increased their step counts by 956 +/- 4107 steps/day (boys) and 999 +/- 1999 (girls). Repeated-measures analysis of variance revealed significant group-by-time interactions for boys (F = 7.4, p = .01, d = .80) and girls (F = 29.6, p <.001, d = 1.27) for mean steps/day. The intervention significantly decreased the number of energy-dense/low-nutrient snacks consumed by boys (chi(2) = 4.0, p = .043) and increased the number of fruit serves among girls (chi(2) = 4.8, p = .028). The intervention did not have a statistically significant effect on sedentary behavior. CONCLUSION: A school-based intervention incorporating physical activity monitoring using pedometers and e-mail support was successful in promoting physical activity and selected healthy eating behaviors in adolescent boys and girls.
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