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Stability of habitual physical activity and sedentary behaviour monitoring by accelerometry in 6-8 year olds

Basterfield, L and Adamson, A.J. and Pearce, M.S. and Reilly, John J (2011) Stability of habitual physical activity and sedentary behaviour monitoring by accelerometry in 6-8 year olds. Journal of Physical Activity and Health, 8 (4). pp. 543-547. ISSN 1543-3080

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Abstract

Accelerometry is rapidly becoming the instrument of choice for measuring physical activity in children. However, as limited data exist on the minimum number of days accelerometry required to provide a reliable estimate of habitual physical activity, we aimed to quantify the number of days of recording required to estimate both habitual physical activity and habitual sedentary behavior in primary school children. We measured physical activity and sedentary behavior over 7 days in 291 6-8 year olds using Actigraph accelerometers. Between-day intraclass reliability coefficients were calculated and averaged across all combinations of days. Although reliability increased with time, 3 days of recording provided reliabilities for volume of activity, moderate-vigorous intensity activity and sedentary behavior of 68%, 71% and 73% respectively. For our sample and setting, 3 days accelerometry provided reliable estimates of the main constructs of physical activity and sedentary behavior.

Item type: Article
ID code: 32177
Keywords: sedentary behaviour, child health, accelerometry, Child Health. Child health services, Personal health and hygiene, including exercise, nutrition
Subjects: Medicine > Pediatrics > Child Health. Child health services
Medicine > Public aspects of medicine > Personal health and hygiene, including exercise, nutrition
Department: Faculty of Humanities and Social Sciences (HaSS) > School of Psychological Science and Health > Physical Activity for Health
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Depositing user: Pure Administrator
Date Deposited: 13 Jul 2011 12:33
Last modified: 07 Nov 2012 12:00
URI: http://strathprints.strath.ac.uk/id/eprint/32177

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