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Republished research: Effectiveness of intervention on physical activity of children: systematic review and meta-analysis of controlled trials with objectively measured outcomes (EarlyBird 54)
  1. Brad Metcalf1,
  2. William Henley2,
  3. Terence Wilkin1
  1. 1Department of Endocrinology and Metabolism, Peninsula College of Medicine and Dentistry, Plymouth University Campus, Plymouth, UK
  2. 2Institute of Health Services Research, Peninsula College of Medicine and Dentistry, University of Exeter Campus, Exeter, UK
  1. Correspondence to: B Metcalf brad.metcalf{at}

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Study question How effective are physical activity interventions at increasing the activity of children?

Summary answer Physical activity interventions achieve a small to negligible increase in total activity, with a small improvement in the time spent at moderate or vigorous intensities amounting to around four more minutes walking or running per day.

What is known and what this paper adds Physical activity interventions have little effect on the prevention of childhood obesity, but the reasons for this have been unclear. The finding that physical activity interventions have little …

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  • ▸ This article is an abridged version of a paper that was published on Cite this article as: BMJ 2012;345:e5888