RUN Rörlig Ungdom Nu : Ett projekt för att förebygga övervikt och öka den fysiska aktivitetsnivån hos skolungdomar genom fysisk aktivitet.
Sammanfattning: Introduction: The increasing prevalence of childhood obesity around the world has promoted researchers to identify ways to slow down or reverse this development. As a part of that work, the school-based obesity prevention project Rörlig Ungdom Nu (RUN) was initiated. Method: The RUN-project was implemented at schools on Hisingen, Göteborg. It was a cooperation between the local school authorities, the primary healthcare and a sport club. The project included 90-180 minutes extra physical activity during school-time each week for one year for children at the age of ten who was included in the study. The children were followed-up for another two years. As outcome measures, both factors related to obesity and health related fitness was measured. For obesity height and weight were measured and body mass index (BMI) were calculated as weight (kg) /height2 (m2), in addition waist circumference was also measured. As markers of health-related fitness all children conducted a Counter Movement Jump (CMJ) and a 10 m shuttle run test for aerobic fitness. The school nurses at each school monitored all measurements. To analyze the effect of the intervention, a series of linear and mixed models were fitted with BMI, waist circumference, CMJ and 10 m shuttle run as dependent variables To control for the possible confounding effects of age, weight and height they were also entered into the models, except when BMI was the dependent variable, then only age was included. Given that children grow and naturally change in both body composition and in fitness level the most interesting variable to evaluate the outcome of the study is the interaction term between group (intervention or control) and time of measurement. Results: In all, 971 children were included distributed on eight intervention schools (n=667) and six control schools (n=304). As expected, all children increased their BMI, waist circumference, CMJ and 10 m shuttle run over time, but this increase was not the same in both groups. The intervention group had a slower increase in waist circumference at both follow up measurement (p<0.05), and they also showed a more preferable outcome in the CMJ and the numbers of shuttle-runs between baseline and follow ups (p<0.001). There was no difference in BMI between the both groups. Conclusion: This study shows that it may be possible to prevent an unfavorable development of obesity if there is a broad approach to the problem, at least in a relative short-term perspective. The long-term effects of such a program is unknown and future studies should address that. Keywords Adolescents, children, physical activity, school Thanks to Patrick Bergman my supervisor and my Family.
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