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Lau, Erica Y.; Dowda, Marsha; McIver, Kerry L.; Pate, Russell R. – Journal of School Health, 2017
Background: We examined longitudinal changes in children's physical activity during the school day, afterschool, and evening across fifth, sixth, and seventh grades. Methods: The analytical sample included children who had valid accelerometer data in fifth grade and at least one other time-point, and provided complete sociodemographic information…
Descriptors: Behavior Change, Physical Activity Level, Gender Differences, Longitudinal Studies