Effectiveness of intervention on physical activity of children: systematic review and meta-analysis of controlled trials with objectively measured outcomes (EarlyBird 54)

To determine whether, and to what extent, physical activity interventions affect the overall activity levels of children.

Systematic review and meta-analysis. DATA SOURCES: Electronic databases (Embase, Medline, PsycINFO, SPORTDiscus) and reference lists of included studies and of relevant review articles. STUDY SELECTION: Design: randomised controlled trials or controlled clinical trials (cluster and individual) published in peer reviewed journals. INTERVENTION: incorporated a component designed to increase the physical activity of children/adolescents and was at least four weeks in duration.