Circadian rhythms

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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…
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…
Big lights not inspiring nature. Seattle Municipal Archives

Dim the lights to restore nature’s body clock

Satellite images of the earth provide a striking picture of our planet during the hours of darkness. From space, the world at night appears as an intricate mass of tiny points of light, clustered into…
Sleeping on the plane is no jet lag cure. Edward Simpson

Mathematicians develop new app to put jet lag to bed

Jet lag is a discomfort many of us will have experienced in the days following a long-haul flight across time zones. Mathematicians in the US may have a jet-lag cure in the form a new app called Entrain…
Adjusting back to standard time is easy for most of us and can happen in one or two days. jamelah e./Flickr

Spring forward, fall back: how daylight saving affects our sleep

Daylight saving time ends this weekend in most states and territories (barring Queensland, Western Australia and the Northern Territory), meaning we’ll turn our clocks back by one hour on Sunday morning…
Good news for those who like a weekend sleep-in: lost sleep can be recovered. Image from shutterstock.com

Explainer: can you pay off your ‘sleep debt’?

Ever have those moments on weekends or public holidays when you wake at your usual time, then realise there’s no pressing need to get up? If you go back for another couple of hours of shut-eye and use…
If any difference exists at all, it’s imperceptibly small, at less than 0.2°C. Ms Cafe

Monday’s medical myth: men are hotter than women

Holding a body close to you, it’s easy to appreciate the warmth a human body can generate. Humans are “warm-blooded” animals. We’re able to effectively maintain a stable internal temperature, even on cold…

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