People who have disrupted sleep cycles have "lower levels of happiness and greater feelings of loneliness", new research suggests.
"While our findings can't tell us about the direction of causality, they reinforce the idea that mood disorders are associated with disturbed circadian rhythms, and we provide evidence that altered rest-activity rhythms are also linked to worse subjective well-being and cognitive ability", Lyall said.
The findings revealed that those who were active during the night or inactive during the day were 6% to 10% more likely to be diagnosed with a mood disorder.
But it's not just what you do at night, he said, it's what you do during the day - trying to be active during the day and inactive in darkness, he said.More news: BT overhauls consumer business with bid to combine mobile and broadband
Those with a lower amplitude were found to be at higher risk of mental issues, even when factors such as age, sex, smoking status, educational attainment and childhood trauma were taken into account.
For the latest study, researchers analysed activity data on 91,105 people to measure their daily rest-activity rhythms (also known as relative amplitude).
Previous research has identified associations between body clock disruption and mental health, but these were typically based on self reports of activity and sleeping patterns, had small sample sizes, or adjusted for few potential cofounders.
"These were people who have very poor sleep hygiene, people on their mobile phones at midnight checking Facebook or getting up to make a cup of tea in the middle of the night", author of the study paper Daniel Smith, from the University of Glasgow, is quoted as saying by The Times.More news: Villanova, Michigan to meet in November in national championship rematch
He added: 'The circadian system undergoes developmental changes during adolescence, which is also a common time for the onset of mood disorders.
"Circadian disruption is reliably associated with various adverse mental health and well-being outcomes, including major depressive disorder and bipolar disorder", the authors write.
"So we need to think about ways to help people tune in to their natural rhythms of activity and sleeping more effectively". "However, these are observational associations and can not tell us whether mood disorders and reduced well-being cause disturbed rest-activity patterns, or whether disturbed circadian rhythmicity makes people vulnerable to mood disorders and poorer well-being". They are fundamental for maintaining health in humans, and integrity of circadian rhythms is particularly important for mental health and wellbeing. The work was funded by a Lister Prize Fellowship to Professor Smith.More news: Syria: Chemical weapons watchdog confirms chlorine gas attack in Saraqeb