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Physical activity and sedentary behaviour trajectories in middle childhood, and the association of these with adiposity.

McFall, Suzanne Elizabeth (2017)
M.Sc. thesis, University of Birmingham.

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Abstract

Background: The prevalence of overweight/obesity increases substantially throughout the middle childhood years. The contribution of physical activity and sedentary behaviour to the development of overweight/obesity is unclear. It is also unknown whether the impacts of physical activity and sedentary behaviour on weight differ by sex.

Purpose: To assess changes in physical activity and sedentary behaviour between the ages of 5-6 and 8-9 years, and the association of these changes with adiposity.

Methods: Longitudinal investigation using an ethnically diverse sample of 1467 children. Separate multilevel linear regression models were constructed with the change in each physical activity/sedentary behaviour measure as the explanatory and follow-up adiposity as the outcome variable.

Results: Physical activity decreased throughout the study period, whilst sedentary time increased. A decrease in moderate-vigorous physical activity (MVPA) was associated with an increase in all adiposity measures in the overall sample and in girls. An increase in TV viewing time was associated with an increase in BMI z-score in the overall sample.

Conclusion: Preventing the decline in MVPA and the increase in TV viewing time during middle childhood could reduce the incidence of overweight/obesity in this age group.

Type of Work:M.Sc. thesis.
Supervisor(s):Pallan, Miranda and Adab, Peymane
School/Faculty:Colleges (2008 onwards) > College of Medical & Dental Sciences
Department:Institute of Applied Health Research, Public Health, Epidemiology and Biostatistics
Subjects:RA0421 Public health. Hygiene. Preventive Medicine
RJ101 Child Health. Child health services
Institution:University of Birmingham
ID Code:7230
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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