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Sleep is Inversely Associated with Sedentary Time among Youth with Obesity

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Objective: Pathways underlying the sleep-obesity relationship in youth are poorly understood. In this study, we examined associations of sleep with sedentary time and moderate-to-vigorous physical activity (MVPA) among youth, stratified by weight category (obesity versus no obesity). A sub-aim examined whether controlling for screen time changed the sleep-sedentary time association. Methods: Methods entailed secondary analysis of baseline data collected June-August 2014-2017 during a school-based healthy weight management trial in Minneapolis/St. Paul, Minnesota. Participants (N = 114) were 8-to-12 years old with BMI ≥ 75th percentile, most of whom were members of racial/ethnic minority groups (57%) or from households receiving economic assistance (55%). Mean nightly sleep duration and daily screen time were measured by survey, MVPA and sedentary time by accelerometer, and height and weight by research staff. Multivariate linear regression examined associations of sleep with sedentary time and MVPA. Results: Sleep was inversely associated with hours of sedentary time (β = -1.34 [-2.11, -0.58] p = .001) and percent of time spent sedentary (β = -2.92 [-4.83, -1.01], p = .004), for youth with obesity only. The association was unchanged by screen time. Sleep was not significantly associated with MVPA in total sample or stratified models. Conclusions: Associations among sleep, activity levels, and obesity may differ based upon movement type (sedentary time vs MVPA) and weight category (obesity vs no obesity).
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Keywords: EXERCISE; PEDIATRIC OBESITY; SCREEN TIME; SEDENTARY BEHAVIOR; SLEEP

Document Type: Research Article

Affiliations: 1: Krista Schroeder, Assistant Professor, Temple University College of Public Health, Department of Nursing, Philadelphia, PA, United States;, Email: [email protected] 2: Martha Y. Kubik, Professor, Temple University College of Public Health, Department of Nursing, Philadelphia, PA, United States 3: John R. Sirard, Associate Professor, Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, United States 4: Jiwoo Lee, Assistant Professor, Cora Meidl Siehl Endowed Chair in Nursing Research, University of Minnesota School of Nursing, Minneapolis, MN, United States 5: Jayne A. Fulkerson, Professor and Cora Meidl Siehl Endowed Chair in Nursing Research, University of Minnesota School of Nursing, Minneapolis, MN, United States

Publication date: November 1, 2020

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  • The American Journal of Health Behavior seeks to improve the quality of life through multidisciplinary health efforts in fostering a better understanding of the multidimensional nature of both individuals and social systems as they relate to health behaviors.

    The Journal aims to provide a comprehensive understanding of the impact of personal attributes, personality characteristics, behavior patterns, social structure, and processes on health maintenance, health restoration, and health improvement; to disseminate knowledge of holistic, multidisciplinary approaches to designing and implementing effective health programs; and to showcase health behavior analysis skills that have been proven to affect health improvement and recovery.

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