A marker for the end of adolescence

This study examines how sleep patterns vary with age and gender. Analyzing data from a large cohort, the researchers found that sleep timing shifts with age and that women tend to have earlier sleep and wake times compared to men in their 20s to 40s. Please read the abstract.

The study’s findings suggest an interesting interplay between the biological circadian clock and social constraints that shape sleep timing throughout life. Refer to Figures 1C and 1D and consider why chronotype shows greater variability after age 65 and why females tend to wake up earlier until around the age of menopause, approximately age 50.