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Title: Role of physical activity and sleep duration in growth and body composition of preschool-aged children

Author
item BUTTE, NANCY - Children'S Nutrition Research Center (CNRC)
item PUYAU, MAURICE - Children'S Nutrition Research Center (CNRC)
item WILSON, THERESA - Children'S Nutrition Research Center (CNRC)
item LIU, YAN - Children'S Nutrition Research Center (CNRC)
item WONG, WILLIAM - Children'S Nutrition Research Center (CNRC)
item ADOLPH, ANNE - Children'S Nutrition Research Center (CNRC)
item ZAKERI, ISSA - Drexel University

Submitted to: Obesity
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/26/2016
Publication Date: 4/18/2016
Citation: Butte, N.F., Puyau, M.R., Wilson, T.A., Liu, Y., Wong, W.W., Adolph, A.L., Zakeri, I.F. 2016. Role of physical activity and sleep duration in growth and body composition of preschool-aged children. Obesity. 24(6):1328-1335.

Interpretive Summary: In this study of 111 healthy preschool-aged children, we examined the impact of energy expenditure and physical activity on growth and body composition. At baseline, we found that heavier children had more sedentary activity and leaner children had more moderate-vigorous physical activity. At 1-year follow-up, the changes in body mass index and lean tissue were positively associated with total energy expenditure, and moderate-vigorous physical activity. Shorter sleep duration predicted greater increases in fat mass. Physical activity promotes normal growth and body composition in preschool-aged children.

Technical Abstract: The impact of physical activity patterns and sleep duration on growth and body composition of preschool-aged children remains unresolved. Aims were (1) to delineate cross-sectional associations among physical activity components, sleep, total energy expenditure (TEE), and body size and composition; and (2) to determine whether physical activity components, sleep, and TEE predict 1-year changes in body size and composition in healthy preschool-aged children. Anthropometry, body composition, accelerometry, and TEE by doubly labeled water were measured at baseline; anthropometry and body composition were repeated 1 year later (n'='111). Cross-sectionally, positive associations between sedentary activity and weight and fat-free mass (FFM) (P = 0.009-0.047), and a negative association between moderate-vigorous physical activity (MVPA) and percent fat mass (FM) (P = 0.015) were observed. TEE and activity energy expenditure (AEE) were positively associated with weight, body mass index (BMI), FFM, and FM (P = 0.0001-0.046). Prospectively, TEE, AEE, physical activity level, and MVPA, but not sedentary activity, were positively associated with changes in BMI (P = 0.0001-0.051) and FFM (P = 0.0001-0.037), but not percent FM. Sleep duration inversely predicted changes in FM (P = 0.005) and percent FM (P = 0.006). Prospectively, MVPA, TEE, AEE, and physical activity level promote normal growth and accretion of FFM, whereas sleep duration inversely predicts changes in adiposity in preschool-aged children.