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Objective measurement of habitual sedentary behavior in pre-school children

Martin, Anne and McNeill, Mhairi and Penpraze, Victoria and Dall, Philippa and Granat, Malcolm and Paton, James Y. and Reilly, John J. (2011) Objective measurement of habitual sedentary behavior in pre-school children. Pediatric Exercise Science, 23 (4). pp. 468-476. ISSN 0899-8493

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Abstract

The Actigraph is well established for measurement of both physical activity and sedentary behavior in children. The activPAL is being used increasingly in children, though with no published evidence on its use in free-living children to date. The present study compared the two monitors in preschool children. Children (n 23) wore both monitors simultaneously during waking hours for 5.6d and 10h/d. Daily mean percentage of time sedentary (nontranslocation of the trunk) was 74.6 (SD 6.8) for the Actigraph and 78.9 (SD 4.3) for activPAL. Daily mean percentage of time physically active (light intensity physical activity plus MVPA) was 25.4 (SD 6.8) for the Actigraph and 21.1 (SD 4.3) for the activPAL. Bland-Altman tests and paired t tests suggested small but statistically significant differences between the two monitors. Actigraph and activPAL estimates of sedentary behavior and physical activity in young children are similar at a group level.