Abstract:

Circadian rhythmic expression differs among individuals and can be classified by circadian typology, which can be classified as morningness (go to bed early and wake up early), eveningness (like to stay up late at night and wake up late), and neither type. Studies have shown that eveningness may be associated with mood disorders, attention deficit hyperactivity disorder, and eating disorders. Genetics, social jetlag (i.e., the misalignment between social and biological time) and personality traits can, to some extent, explain the relationship between circadian typology and mental health. Future research should emphasize improving study design and measurement methods to explore the mechanisms behind this relationship in greater depth, and strengthening localization research on the relationship between circadian typology and mental health.

Key words: circadian typology, morningness, eveningness, mental health