They found strong evidence to support the use of programmes where adolescents were involved in school-based initiatives but where the family or community had to become involved as well, for example, through homework assignments or incorporating physical activity into existing community events. The effects seen in the studies ranged from 3 minute increases during PE to a 50% increase in the number of participants being regularly active.
Overall they say there was stronger evidence for the effectiveness of physical activity programmes among adolescents, yet that could be because the studies were of higher quality and they also included large sample sizes. One of the reasons for the increased effectiveness among adolescents could also be that they are known to be less active than children so there could be greater potential for change.
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