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Articles on Circadian rhythms

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Micro changes have macro results. Darryl Leja, National Human Genome Research Institute, National Institutes of Health

Circadian rhythms and the microbiome: Disrupting daily routine of gut microbes can be bad news for whole body

New research suggests our gut microbes have their own circadian rhythms that in turn influence our organ functions. Is this an explanation for how disrupting our daily patterns can cause health problems?
Not dark enough. People in bed via www.shutterstock.com.

Are we sleep-deprived or just darkness-deprived?

Is electricity making us sleep less? A new study on sleep in preindustrial societies suggests the answer is no. But it misses a big point: people in preindustrial societies spend more time in darkness than we do.
Light from electronic devices can alter the quality of sleep our quality. Alexander Rentsch/Flickr

Booting up or powering down: how e-readers affect your sleep

While many of these devices, especially e-readers, seem harmless enough, the light they emit may affect our sleep patterns and leave us feeling tired the next day.
Time spent checking the clock when you can’t sleep may be feeding your insomnia. bark/Flickr

Explainer: what is insomnia and what can you do about it?

We all have a poor night’s sleep from time to time: those nights when you lie awake for hours trying desperately to go to sleep but can’t stop worrying about tomorrow. Or when you repeatedly wake up throughout…
Athletes will need to watch their sleeping habits if they want to finish first. Australian Paralympic Committee/Australian Sports Commission

Peak athletic performance is dependent on sleep cycle

Athletic performance can vary over the course of the day by up to 26%, depending on the athlete’s circadian rhythm, according to research published in the journal Current Biology. The study illustrates…
The best way to keep your hand off the snooze button is to have a regular sleep schedule every day of the week. Bethan/Flickr

Morning haze: why it’s time to stop hitting the snooze button

It’s 6.30am and after a long holiday break, your alarm clock is insistently telling you it’s time to get out of bed. For many people – me included – the automatic reaction is to hit the snooze button…
Don’t blame it on the snow. Ilaria Coradazzi

Explainer: what is seasonal affective disorder?

It’s that time of year again - the end of daylight savings and the beginning of the dark season. While many of us look forward to seasonal festivities, millions can also expect feelings of depression…
Most adults need seven to nine hours sleep to function at their best. Jiuck/Flickr

Explainer: how much sleep do we need?

The amount of sleep adults need has once again come under the spotlight, with a recent Wall Street Journal article suggesting seven hours sleep is better than eight hours and the American Academy of Sleep…
It’s mid-afternoon but your body clock’s telling you it’s the middle of the night. Ed Yourdon

Explainer: what is jet lag and how can you overcome it?

Long flights across many time zones often leave us feeling fatigued, sleepy, irritable and generally out of sorts. And it’s not just because of poor sleep on the plane and dehydration from the altitude…

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