About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Is Sleeping 5 Hours a Night and Having a Short Nap Alright?

by Rishika Gupta on February 24, 2019 at 8:01 PM
Font : A-A+

 Is Sleeping 5 Hours a Night and Having a Short Nap Alright?

Sleeping 5 hours a night and supplementing it with 1.5-hour afternoon nap is good for children's memory, but not for blood glucose levels. The results of this study are published in the journal of Sleep.

Many teenage students sleep less than the recommended duration of 8-10 hours a night. It is unclear; however, whether short night sleep combined with an afternoon nap is as good as having the same amount of sleep continuously during the night without a nap.

Advertisement


Researchers at Duke-NUS Medical School have demonstrated for the first time that different sleep schedules with the same total sleep opportunity over 24 hours may have different effects on cognition and glucose levels. This is the first study to gather experimental evidence on the notion that 'what may be appropriate sleep for one health goal may not be for another.'

The handful of studies that examined split sleep schedules with normal total sleep duration in working-age adults found that both schedules yield comparable brain performance. However, no research has looked at the impact of such schedules on brain function and glucose levels together, especially when total sleep is shorter than optimal. The latter is essential because of links between short sleep and risk for diabetes.
Advertisement

The researchers measured cognitive performance and glucose levels following a standardized load in students, aged 15-19 years, during two simulated school weeks with short sleep on school days and recovery sleep on weekends. On school days, these students received either continuous sleep of 6.5 hours at night or split sleep (night sleep of 5 hours plus a 1.5-hour afternoon nap).

"We undertook this study after students who were advised on good sleep habits asked if they could split up their sleep across the day and night, instead of having the main sleep period at night," said Prof. Michael Chee, Director of the Centre for Cognitive Neuroscience, Professor of Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School and one of the study's senior authors.

"We found that compared to being able to sleep 9 hours a night, having only 6.5 hours to sleep in 24 hours degrades performance and mood. Interestingly, under conditions of sleep restriction, students in the split sleep group exhibited better alertness, vigilance, working memory and mood than their counterparts who slept 6.5 hours continuously. This finding is remarkable as the measured total sleep duration over 24 hours was less in the former group", Prof. Chee added.

However, for glucose tolerance, the continuous schedule appeared to be better. "While 6.5 hours of night sleep did not affect glucose levels, the split sleep group demonstrated a greater increase in blood glucose levels to the standardized glucose load in both simulated school weeks," noted Dr. Joshua Gooley, Associate Professor of Neuroscience and Behavioral Disorders Programme, Principal Investigator at the Centre for Cognitive Neuroscience, Duke-NUS Medical School and the senior co-author of this study.

Although further studies are necessary to see if this finding translates to a higher risk of diabetes later in life, the current results indicate that beyond sleep duration, different sleep schedules can affect different facets of health and function in directions that are not immediately clear.

Professor Patrick Casey, Senior Vice Dean of Research, Duke-NUS Medical School, commented, "Recent sleep surveys show that Singaporeans are among the world's most sleep-deprived people. This is the latest in a series of studies from a team of researchers from the Neuroscience and Behavioural Disorders Programme and Centre for Cognitive Neuroscience that has provided valuable insights into the importance of good sleep."

Source: Eurekalert
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
Health Benefits of Sea Buckthorn
Contraceptive Pills in Polycystic Ovary Syndrome (PCOS) Curtail Type 2 Diabetes Risk
Mushroom May Help Cut Down the Odds of Developing Depression
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Amyotrophic Lateral Sclerosis (ALS) Top Health Tips to Overcome Tiredness Sleeping Scale Acute Coronary Syndrome 

Recommended Reading
Poor Sleep May Clog Your Arteries and Increase the Risk of Heart Disease
Not getting enough sleep raises the risk of serious problems like heart disease and stroke, finds a ...
Nearly 90 Percent of Kids with Sleep Apnea Go Undiagnosed
Nearly 15 percent of children have sleep apnea, a form of sleep-disordered breathing (SDB). ......
Obstructive Sleep Apnea Tied to Inflammation, Organ Dysfunction
New study investigates the link between obstructive sleep apnea and inflammation, organ damage. The ...
Nemuri Encoded Protein in Fruit Flies Promotes Sleep and Fights Infection
Scientists have discovered a bacterial-fighting peptide in fruit flies that promotes sleep after ......
Acute Coronary Syndrome
Acute coronary syndrome (ACS) is a sudden, acute life-threatening condition caused by a dramatic red...
Amyotrophic Lateral Sclerosis (ALS)
Find out more about the degenerative disease- Amyotrophic lateral sclerosis....
Top Health Tips to Overcome Tiredness
If you follow a healthy lifestyle and still feel tired, you should rule out all possible medical cau...

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use