Developmental disparities in sedentary time by period of the day among US youth: a cross-sectional study

María Enid Santiago-Rodríguez, Jinsong Chen, Karin A. Pfeiffer, David X. Marquez, Angela Odoms-Young & Eduardo Esteban Bustamante
Abstract Background Definitive evidence shows sedentary time (ST) is an independent risk factor for chronic disease, irrespective of physical activity. Despite calls to limit youth ST, studies demonstrate a spike in ST at the transition from childhood to adolescence. Identifying periods of the day (e.g., before school, during school, afterschool, and evenings) during which ST is higher in adolescents vs. children—that is, specifying when within daily routines ST disparities emerge—may be important to inform intervention...
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