Physical Activity, Sedentary Behavior, and Adiposity in English Children

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• 作者：Laura Basterfield ; PhD^a ; Mark S. Pearce ; PhD^b ; Ashley J. Adamson ; PhD^a ; Jessica K. Frary ; MSc^a ; Kathryn N. Parkinson ; PhD^a ; Charlotte M. Wright ; MD^c ; John J. Reilly ; PhD^d ; ^{john.j.reilly@strath.ac.uk} ; Gateshead Millennium Study Core Team
• 刊名：American Journal of Preventive Medicine
• 出版年：2012
• 期刊代码：8_07493797
• 类别：med
• 出版时间：May, 2012
• 卷：42
• 期：5
• 页码：445-451
• 文件大小：229 K

摘要

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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 <em>Zem>-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 <em>Zem>-score in boys but not girls. Increased sedentary behavior was not associated with increased BMI <em>Zem>-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.