Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Older people may need less sleep, study finds

25.07.2008
Along with all the other changes that come with age, healthy older people also lose some capacity for sleep, according to a new report in Current Biology (24 July).

When asked to stay in bed for 16 hours in the dark each day for several days, younger people get an average of 9 hours of shuteye compared to 7.5 for older people, the researchers report.

“The most parsimonious explanation for our results is that older people need less sleep,” said Elizabeth Klerman of Brigham and Women’s Hospital & Harvard Medical School, who conducted the study with Professor Derk-Jan Dijk of the University of Surrey. “It’s also possible that they sleep less even when given the opportunity for more sleep because of age-related changes in the ability to fall asleep and remain asleep,” she added, noting that the new results apply only to healthy individuals taking no medication and having no medical conditions or sleep disorders.

The study also found that most healthy people, and young people in particular, don’t get as much sleep as they need.

The idea that sleep changes markedly across the life span isn’t new. In fact, insomnia is a common complaint amongst older people. But whether age-related changes in sleep are due to changes in social factors, circadian rhythms, or shifts in the an internal “set point” for sleep need or the ability to sleep had remained unresolved.

In the new study, Klerman and Dijk set out to compare the capacity for sleep in young people (between the ages of 18 and 32) compared to older people (age 60 to 72) under conditions that controlled for circadian rhythms by allowing the chance to sleep both during the night and day and by controlling individual choices in sleep opportunities.

“While humans can sometimes override the homeostatic set point and not sleep when tired, there is no evidence that they can sleep when they are not tired,” Klerman explained.

Given the same amount of time in bed, older people take longer to fall asleep and sleep for less time than younger people do, they found. When required to remain in bed for 16 hours a day, older people slept 1.5 hours less on average than younger people, they showed. That age-related decline in sleep included an even split between rapid eye movement (REM) sleep, which is associated with dreaming, and non-REM sleep, they found.

The findings may influence treatment for insomnia in older people, Klerman said.
“If older people believe that they need more sleep than they can achieve even when they spend extra time in bed, then they may complain of insomnia: being awake when wanting to be asleep. They may start using medications needlessly. If they are tired during the day, they should consider evaluation for a sleep disorder that may be interfering with their ability to obtain good sleep at night”

Stuart Miller | alfa
Further information:
http://www.surrey.ac.uk

More articles from Studies and Analyses:

nachricht Win-win strategies for climate and food security
02.10.2017 | International Institute for Applied Systems Analysis (IIASA)

nachricht The personality factor: How to foster the sharing of research data
06.09.2017 | ZBW – Leibniz-Informationszentrum Wirtschaft

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>