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1: Lancet. 2004 Jan 17;363(9404):211-2.
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Total energy expenditure and physical activity in young Scottish children: mixed longitudinal study.

Reilly JJ, Jackson DM, Montgomery C, Kelly LA, Slater C, Grant S, Paton JY.

University of Glasgow Division of Developmental Medicine, Royal Hospital for Sick Children, G3 8SJ, Glasgow, UK. jjr2y@clinmed.gla.ac.uk

Childhood obesity has been attributed to a decline in total energy expenditure (TEE). We measured TEE, physical activity, and sedentary behaviour in a representative sample of young children from Glasgow, UK, at age 3 years (n=78), and we did a follow-up study at age 5 years (n=72). Mean physical activity level (TEE/resting energy expenditure) was 1.56 (SD 0.39) at age 3 years and 1.61 (0.22) at age 5 years. Median time in sedentary behaviour was 79% of monitored hours at age 3 years (IQR 74-84) and 76% (71-80) at age 5 years. Median time spent in moderate to vigorous physical activity represented only 2% of monitored hours at age 3 years (IQR 1-4) and 4% at age 5 years (2-6). Modern British children establish a sedentary lifestyle at an early age.

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PMID: 14738795 [PubMed - indexed for MEDLINE]