Journal
AMERICAN JOURNAL OF PREVENTIVE MEDICINE
Volume 42, Issue 5, Pages 445-451Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.amepre.2012.01.007
Keywords
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Funding
- National Prevention Research Initiative
- British Heart Foundation
- Cancer Research UK
- Department of Health
- Diabetes UK
- Economic and Social Research Council
- Food Standards Agency
- Medical Research Council
- Research and Development Office for the Northern Ireland Health and Social Services
- Chief Scientist Office, Scottish Government Health Directorates
- Welsh Assembly Government
- World Cancer Research Fund
- Chief Scientist Office, Scottish Government Health Directorates [CZH/4/484]
- Henry Smith Charity and Sport Aiding Research in Kids (SPARKS)
- Gateshead NHS Trust RD
- Northern and Yorkshire NHS RD
- Northumberland
- Tyne
- Wear NHS Trust
- Gateshead Health NHS Foundation Trust
- Gateshead Education Authority
- ESRC [ES/G007470/1] Funding Source: UKRI
- MRC [G0501306, G0900686] Funding Source: UKRI
- Chief Scientist Office [CZH/4/484] Funding Source: researchfish
- Economic and Social Research Council [ES/G007470/1] Funding Source: researchfish
- Medical Research Council [G0900686, G0501306] Funding Source: researchfish
- National Institute for Health Research [PHCS/C4/4/008] Funding Source: researchfish
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Background: The importance of variation in total volume of physical activity or moderate-to vigorous-intensity physical activity (MVPA) to development of body fatness in childhood is unclear, and it is unclear if physical activity has a greater influence on adiposity in boys than girls. Purpose: To assess relationships between 2-year changes in objectively measured physical activity, sedentary behavior, and adiposity in English children. Methods: Prospective cohort study, set in Northeast England, of a socioeconomically representative sample of 403 children. Measures were change in accelerometer-determined physical activity and sedentary behavior from age 7 to 9 years (data collected 2006/2007 and 2008/2009; analyzed in 2010) and concurrent change in adiposity (fat mass index derived from bioelectric impedance) and change in BMI Z-score. Results: Decline in MVPA was associated with a greater increase in fat mass index in boys but not girls. Declining MVPA was associated with increased BMI Z-score in boys but not girls. Increased sedentary behavior was not associated with increased BMI Z-score in either gender. Conclusions: Avoiding mid-late childhood reductions in MVPA may reduce excessive fat gain, although such strategies may have greater impact on boys than girls. (Am J Prev Med 2012;42(5):445-451) (C) 2012 American Journal of Preventive Medicine
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