Staying up late and lying in could increase your risk of mental illness, experts have warned.
People who go to bed early and wake up early report higher mental well-being, the University of Exeter researchers said.
The findings, published in the journal Nature Communications, could lead to new treatments for people with sleep disorders.
Written in your DNA
They analysed the genes and lifestyles of 697,828 people.
They identified 351 genetic variations linked to being a ‘morning lark’ or ‘night owl.’
Those with the most ‘night’ variations were programmed to wake up to 25 minutes later.
And they were more likely to suffer from mental health issues.
But the boffins found no link between these genetic variations, sleep duration and sleep quality.
It is thought the genes affect the effectiveness of the retina, which reacts to sunlight and ‘resets’ the body clock each day.
Our body clocks are influenced by genes and lifestyle factors including diet, exposure to artificial light and our jobs and activities.
Weedon said more research is needed to fully understand the link between being an early riser and mental well-being.
Source: New York Post