ABSTRACT
In the United States, the Coronavirus Disease 2019 (COVID-19) pandemic necessitated nationwide closures of kindergarten through twelfth grade (K-12) schools. Stay-at-home orders and social distancing mandates were also implemented to mitigate the spread of COVID-19. The purpose of this systematic review was to synthesize the existing literature on how COVID-19 impacted K-12 students' eating patterns, physical activity, and sleep in the United States. Utilizing the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a literature search was conducted between October and December 2021. Inclusion criteria were studies focused on COVID-19 and eating patterns, physical activity, and sleep in students enrolled in K-12 schools since March 2020. International studies were excluded. Mixed findings were observed for eating patterns whereby the consumption of unhealthful savory and sweet items and healthful snacks (e.g., fruit and vegetables) increased. Reductions in physical activity and disrupted sleep routines were also observed. Heterogeneity in methodological procedures may limit the generalizability of these findings. In the United States, preliminary data suggest that select health-promoting behaviors were negatively impacted by the COVID-19 pandemic. Given that prolonged unhealthful eating patterns, physical inactivity, and poor sleep contribute to chronic disease risk, initiatives that increase health-promoting behaviors are warranted.