Abstract Overview
Background:
Differences in associations between movement behaviours and mental health outcomes have been reported in youth samples stratified for sex and race, suggesting potential differential susceptibility among socially marginalized youth.
Purpose:
To assess which combinations of moderate-to-vigorous physical activity (MVPA), screen time, and sleep were associated with best and worst mental well-being and mental ill-health in a sample of adolescents; and whether associations differed based on racial identity.
Methods:
Cross-sectional self-report data from a 2021-2022 cohort of Canadian secondary school students included 15,679 Racialized, 47,736 White, and 4,143 Multiracial youth. Associations between movement compositions with mental health status and interactions based on race were assessed with regression. Behaviour combinations where predictions were in the top 5% were deemed “Goldilocks” compositions.
Results:
Mean (SD) age was 14.8 (2.3) years. Race significantly modified the association with all mental health outcomes. Dose response gradients illustrate that the association between sleep duration and mental health is stronger for White youth than Racialized or Multiracial youth. At lower volumes of screen use, the association with mental health was also more negative among White youth. No major difference between racial groups was observed for the MVPA dose-response gradient. Goldilocks compositions were similar across racial groups and tended to support maximizing sleep and MVPA while minimizing screen use.
Conclusions:
Racialized youth appear to be accruing less benefits from similar amounts of sleep as White peers. Sleep quality is hypothesized to be a potential contributor to this difference.
Practical implications:
The whole day matters for the relationship between movement and health indicators. Promoting sleep quality, not just quantity, may be especially important for promoting health in racialized communities.
Funding:
Analyses were supported by an anonymous donation to the Children’s Hospital of Eastern Ontario to develop the Precision Child and Youth Mental Health Initiative.
Additional Authors