Tick tock: Study links body clock to mood disorders

Georgia Reed
May 17, 2018

Disrupting your body clock can increase your risk of mood disorders and depression - and simply using your phone late at night is a bad idea.

Dr. Laura Lyall, the research's lead author, said that the team had found a "robust association" between the disruption of circadian rhythms and the mood disorders. Circadian disruption was also associated with lower subjective wellbeing, higher neuroticism and greater mood instability.

[2] Relative amplitude is the distinction, in terms of activity levels, between the active and rest periods over 24 hours.

"It's widely known that a good night's sleep is a good thing for well-being and health".

Professor Daniel Smith, professor of psychiatry at the university, said: 'A healthy rhythm is to be quite active during the day and very inactive at night.

The results held true even after adjusting for a wide range of influential factors including age, sex, lifestyle, education, body mass index, and childhood trauma.

The researchers used activity data on 91,105 participants in the UK Biobank cohort to obtain an objective measure of daily rest-activity rhythms, called relative amplitude.

Our internal body clocks regulate every biological process in our bodies such as eating, our blood pressure, and sleeping.

Disruption of daily rhythms linked to mental health problems

"Previous studies have identified associations between disrupted circadian rhythms and poor mental health, however, these were on relatively small samples".

"The next step will be to identify the mechanisms by which genetic and environmental causes of circadian disruption interact to increase an individual's risk of depression and bipolar disorder".

"By 2030, two-thirds of the world's population will be living in cities, and we know that living in an urban environment can be pretty toxic to your circadian system because of all the artificial light that you're exposed to", Smith said.

People who fail to follow their natural body clock rhythm are more likely to have depression and mental health problems, a study has found. "Hopefully, that will protect a lot of people from mood disorders".

Researchers in the United Kingdom made the conclusion by studying the circadian rhythm: our waking and sleeping patterns throughout the 24-hour sleep cycle. "But equally important is a pattern of exposing yourself to sunshine and daylight in the morning and doing activity in the morning or midday so you can actually sleep properly". "However, these are observational associations and can not tell us whether mood disorders and reduced wellbeing cause disturbed rest-activity patterns, or whether disturbed circadian rhythmicity makes people vulnerable to mood disorders and poorer wellbeing".

"And it's likely they affect each other in a circular fashion", she added.

WEDNESDAY, May 16, 2018 (HealthDay News) - Circadian disruption and lower relative amplitude are both associated with higher risk of susceptibility to mental health issues, according to a study published online May 15 in The Lancet Psychiatry.

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