Evening preference and morning tiredness are linked to less exercise and more sitting during free time

A total of 4904 adults aged 25-74 years were analyzed for chronotype classification using latent class analysis.

• Five distinct chronotype groups were identified: 'rested more-evening type' (28%), 'rested more-morning type' (24%), 'morning type' (23%), 'tired more-evening type' (17%), and 'evening type' (8%).
• Morning alertness was a key characteristic that differentiated the identified chronotype groups.
• 'Evening type' and 'tired more-evening type' groups had higher odds of low physical activity compared to the 'morning type'.
• 'Evening type' was associated with spending more time sitting compared to the 'morning type'.
• Assessing sleep schedules and morning tiredness may be important for understanding health behaviors related to physical activity and health status.

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