We examined the prospective associations of COVID-19 fears and behavior, and daily physical activity and dysregulated eating. Adolescents (N = 31) aged 11-17 completed selected subscales of the Fear of Illness and Virus Evaluation and completed a 7-day health behavior diary. Greater fear of contamination was associated with lower daily physical activity. In contrast, greater COVID-19 precautionary behavior was associated with greater daily physical activity. COVID-19 fears and precautionary...