Limited effects of a 2-year school-based physical activity intervention on body composition and cardiorespiratory fitness in 7-year-old children
| Autor: | Kristjan Thor Magnusson, Erlingur Johannsson, Thorarinn Sveinsson, Ingvar Sigurgeirsson, Hannes Hrafnkelsson |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Diet therapy Physical fitness Iceland Health Promotion Standard score Education law.invention Randomized controlled trial law Intervention (counseling) Post-hoc analysis medicine Humans Obesity Child Students Exercise Schools business.industry Public Health Environmental and Occupational Health Cardiorespiratory fitness Diet Treatment Outcome Physical Fitness Body Composition Physical therapy Female business Body mass index |
| Zdroj: | Health Education Research. 27:484-494 |
| ISSN: | 1465-3648 0268-1153 |
| DOI: | 10.1093/her/cys049 |
| Popis: | The aim of this study was to assess the effects of a 2-year cluster-randomized physical activity and dietary intervention program among 7-year-old (at baseline) elementary school participants on body composition and objectively measured cardiorespiratory fitness. Three pairs of schools were selected and matched, then randomly selected as either an intervention (n = 151) or control school (n = 170). None of the effect sizes of body composition were statistically significant. Children in the intervention group increased their fitness by an average of 0.37 z score units more than the controls (95% CI:-0.27 to 1.01, P = 0.18), representing an improvement of 0.286 W/kg. Boys had higher fitness (mean(diff) = 0.35 z scores, 95% CI: 0.13-0.58, P = 0.001) than girls, independent of study group, fitness z score at baseline and body mass index. Post hoc analysis showed that the intervention school with the highest fitness z score change was significantly different from two of the lowest control schools (mean(diff) = 0.83 z scores, 95% CI: 0.44-1.21, P < 0.0001 and mean(diff) = 0.70 z scores, 95% CI: 0.29-1.10, P = 0.01), but it was also significantly different from the lowest intervention school (mean(diff) = 0.59 z scores, 95% CI: 0.19-0.99, P = 0.05). The results of this intervention are inconclusive as regards to the effects on fitness, but the intervention did not have any statistically significant effect on body composition. |
| Databáze: | OpenAIRE |
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