Late Sleep Patterns in Teens Associated with Unhealthy Eating and Less Exercise

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A study to be presented at the SLEEP 2024 annual meeting reveals a link between circadian misalignment—joint in adolescents—and increased carbohydrate consumption and sedentary behaviour. The research found that teens with later sleep schedules tend to consume more carbohydrates, a relationship partially explained by irregular sleep patterns. Additionally, a later sleep schedule was associated with more sedentary behaviour, even when accounting for factors like demographics, sleep disorders, and insufficient sleep.

The study led by researchers from Penn State College of Medicine, involved 377 Penn State Child Cohort adolescents. Participants underwent at-home actigraphy and in-lab polysomnography to determine their sleep patterns, while their physical activity and carbohydrate intake were also assessed. The findings suggest that delaying sleep schedules during adolescence, a common occurrence can lead to circadian misalignment with the natural day-night cycle and social responsibilities. This misalignment is linked to poor dietary choices and reduced physical activity, contributing to obesity and poor cardiometabolic health.

The American Academy of Sleep Medicine emphasizes that healthy sleep requires adequate duration, quality, timing, and regularity, free from disturbances or disorders. The study highlights the importance of proper circadian alignment for adolescent health. Researchers suggest that addressing circadian misalignment should be a key component of interventions aimed at improving diet and physical activity in youth.