Physical activity and BMI in adolescence – Authors' reply

Obesity is multifactorial, and the rising obesity of today's children could as readily be the expression of unchanging activity confronted by an ever-increasing calorie intake to which they are maladapted-children with the lowest (innate) activity suffering the most. As has been pointed out, li...

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Bibliographic Details
Published in:The Lancet (British edition) 2005-12, Vol.366 (9502), p.2003-2004, Article 2003
Main Authors: Kimm, Sue YS, Glynn, Nancy W, Obarzanek, Eva, Kriska, Andrea M, Liu, Kiang
Format: Article
Language:English
Subjects:
Accelerometers
Body mass index
Children
Obesity
Public health
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Summary:Obesity is multifactorial, and the rising obesity of today's children could as readily be the expression of unchanging activity confronted by an ever-increasing calorie intake to which they are maladapted-children with the lowest (innate) activity suffering the most. As has been pointed out, little reliability can be placed on self-report of food intake,3 weakening further [Sue Y S Kimm] and colleagues' premise. Not only is the direction of causality in their report uncertain, but there is no published evidence elsewhere that children adjust their overall activity according to opportunity and provision. Indeed, there is increasing evidence that they do not.4 Future intervention studies using accelerometers must be sure to incorporate total waking time (for total activity) and to observe the response of children in the free-living state if the public-health message is to be generalisable.
ISSN:0140-6736
1474-547X
DOI:10.1016/S0140-6736(05)67811-7