No link between sleep, fatigue level: research

August 1, 2013

New Swedish research has shown that there is little or no relation between how much sleep people get at night and how fatigued they feel, the head researcher said Thursday.

"The length of sleep is not a good measurement to analyse whether we get enough sleep or not," Torbjoern Aakerstedt told AFP of the studies conducted at the Stress Research Institute of Stockholm University.

"It's genetically conditioned and dependent on age and health," he said.

Aakerstedt's team has conducted three different studies, one of which investigated the of nearly 6,000 individuals.

The research suggests that the number of hours slept is of much less importance in determining how a person functions throughout the day.

"If you feel fine and dynamic during the day, you've probably slept enough," said Aakerstedt.

The research, to be published later this year, found the average number of hours slept during a working week is six hours 55 minutes, with an extra hour's sleep during holidays.

The researcher said that 20-year-olds should sleep eight hours on average, whilst 60-year-olds require only six.

"But there is no general average," Aakerstedt added. "Twenty-year-olds can sleep even more, but still be tired during the day" as their brain is still developing.

Yet, although more sleep does not mean more energy, no one should sleep too little, as it affects one's health, he said.

Too little sleep can result in a weak immune system, , , , workplace incidents and .

Explore further: To sleep: perchance to dream ...

Related Stories

To sleep: perchance to dream ...

July 24, 2013

"Sleep is the best medicine," says the old proverb. But many adults don't benefit enough from sleep, with as many as 60 percent reporting sleep problems at least several nights a week.

Getting enough sleep could help prevent type 2 diabetes

June 18, 2013

Men who lose sleep during the work week may be able to lower their risk of developing Type 2 diabetes by getting more hours of sleep, according to Los Angeles Biomedical Research Institute (LA BioMed) research findings presented ...

Sleep tips for summer nights

July 8, 2013

(HealthDay)—Those extra hours of daylight in the summer contribute to sleep problems experienced by many Americans, experts say.

Researchers explore childhood development and sleep patterns

July 24, 2013

Be it the stress of poor work-life balance and everyday living or the seemingly endless stream of technological advancement unleashed globally on a daily basis, sleep patterns have become neglected for some and nightmarish ...

Adult sleep shortages debunked by study

December 12, 2011

(Medical Xpress) -- University of Sydney researchers have debunked the widespread belief that technological devices such as computers and mobile phones are increasingly eating into our sleep.

Recommended for you

Want to exercise more? Get yourself some competition

October 27, 2016

Imagine you're a CEO trying to get your employees to exercise. Most health incentive programs have an array of tools—pamphlets, websites, pedometers, coaching, team activities, step challenges, money—but what actually ...

Sleep loss tied to changes of the gut microbiota in humans

October 25, 2016

Results from a new clinical study conducted at Uppsala University suggest that curtailing sleep alters the abundance of bacterial gut species that have previously been linked to compromised human metabolic health. The new ...


Adjust slider to filter visible comments by rank

Display comments: newest first

3 / 5 (4) Aug 01, 2013
So they are suggesting that evolution developed sleep patterns for no apparent reason? And if you were to get 1 or 2 hours sleep, it would have no overall effect on energy levels or functioning? These guys have never suffered from a sleep disorder. Then again, someone had to get paid.
3 / 5 (4) Aug 01, 2013
This might be true for CFS, but not true for sleep in general.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.