Nature and science of sleep

Evening people may have lower work ability partly because they don’t get enough sleep, based on a large study of working adults

Updated

Abstract

In a population-based sample of 13,114 Finnish adults, evening-types reported higher exhaustion and poorer working ability compared to morning-types.

  • Evening-types, particularly definite evening-types, experienced greater levels of exhaustion across all working ages, peaking at ages 45 to 54 years.
  • Definite evening-types showed poorer working ability than definite morning-types, specifically in the age range of 35 to 54 years.
  • Evening-types were more likely to experience social jet lag and reported higher instances of insufficient sleep compared to morning-types.
  • Insufficient sleep was associated with poorer working ability and partially mediated the relationship between and working ability.

Simplified

Key numbers

31.8%
Increase in Exhaustion
General exhaustion among definite evening-types aged 45 to 54 years.
25% to 33%
Insufficient Sleep Prevalence
Percentage of evening-types reporting insufficient sleep across working-age groups.

Full Text

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