Day-to-day and longer-term longitudinal associations between physical activity, sedentary behavior, and sleep in children. Issue 4 (26th October 2020)

• Record Type: Journal Article
• Authors: Antczak, Devan; Sanders, Taren; del Pozo Cruz, Borja; Parker, Philip; Lonsdale, Chris
• Is Part Of: Sleep. Volume 44:Issue 4(2021)
• Publication Date: 2020-10-26
• Subjects: sleep -- physical activity -- child -- pediatric -- longitudinal -- actigraphy; Sleep -- Physiological aspects -- Periodicals; Sleep disorders -- Periodicals; Sommeil -- Aspect physiologique -- Périodiques; Sommeil, Troubles du -- Périodiques; Sleep disorders; Sleep -- Physiological aspects; Sleep -- physiological aspects; Sleep Wake Disorders; Psychophysiology; Electronic journals; Periodicals; 616.8498
• DOI: 10.1093/sleep/zsaa219
• Languages: English
• ISSNs: 0161-8105

Abstract

Abstract: Study Objectives: To determine the day-to-day and longer-term longitudinal associations between daytime physical activity and night-time sleep. Methods: We used data from a 2-year longitudinal study which included three time points (i.e. baseline, year 1, and year 2). Participants were recruited from primary schools and included 1059 children (50% girls) with a mean age of 8.81-years-old (SD = 0.72) at baseline. Sleep variables included sleep duration, sleep efficiency, time in bed, sleep onset, and wake time. Physical activity variables included light, moderate, moderate-to-vigorous, and vigorous physical activity as well as sedentary time. We objectively assessed physical activity and sleep behaviors using the GENEActiv wrist-worn accelerometer over an 8-day period at each timepoint for a potential 21 190 observed days. Results: We used fixed-effects multilevel models and parallel latent growth curve modeling to examine day-to-day and longer-term associations, respectively. Day-to-day, physical activity, and sleep variables were significantly, positively, and bidirectionally associated, except for sleep efficiency, which showed little association with physical activity. Longer-term, we found little association between physical activity and sleep variables. Conclusions: Overall, our findings indicate that there is a day-to-day association between the amount of time spent being physically active and improved sleep. The lack of a longer-term association indicates that a focus on children's daily behavior may be most appropriate to help children improve sleep and increase physical activity.