0237 Day-to-day Associations Between Nightly Sleep, Sedentary Behavior and Physical Activity in Under-resourced Caregiver-Child Dyads

Abstract Introduction Sleep and physical activity behaviors co-exist on a 24-hour continuum of movement, both independently contribute to long-term health. Limited research has examined temporal, day-to-day associations between sleep among caregiver-child dyads dwelling in under-resourced homes. We aim quantify the bidirectional objectively measured health metrics, sedentary behavior (SB), moderate-to-vigorous (MVPA) ecologically valid contexts. Methods 26 families (17 7 triads; N=55) from socioeconomically disadvantaged Delaware Philadelphia communities participated this micro-longitudinal study. Dyads wore an Actigraph their wrist for up 14-days measure health, SB, MVPA. metrics included nighttime duration (minutes), timing onset offset (hours), efficiency (percentage time bed spent asleep). Multi-level models quantified nightly with next-day SB MVPA, daily MVPA subsequent sleep. Models adjusted age, sex, race, day week, caregiver education, primary status. Results At within-subjects level children (46% female, 10.37□2.65 years) caregivers (85% 40.45□11.82 years), nights longer-than-average were associated less-than-average (p< 0.001). For caregivers, later-than-average was more-than-average (p=0.05), while children, 0.01). higher-than-average 0.001); 0.05). Conclusion The complex sleep, underscores consideration movement family-based interventions. Furthermore, similarities warrants further investigation interrelatedness family behaviors. Support (if any) University General Research Grant, School Nursing SEED funding, Centers Biomedical Excellence (COBRE) cardiovascular (P20GM113125).