\n
\n\tAccording to a new study conducted by academics at UCL and the University of the Republic in Uruguay, daytime napping may assist to protect brain function by slowing the speed at which our brains shrink as we age.<\/p>\n
\n\tThe study, published in the journal Sleep Health, analysed data from people aged 40 to 69 and found a causal link between habitual napping and larger total brain volume – a marker of good brain health linked to a lower risk of dementia and other diseases.<\/p>\n
\n\tSenior author Dr Victoria Garfield (MRC Unit for Lifelong Health & Ageing at UCL) said: “Our findings suggest that, for some people, short daytime naps may be a part of the puzzle that could help preserve the health of the brain as we get older.”<\/p>\n
\n\tPrevious research has shown that napping has cognitive benefits, with people who have had a short nap performing better in cognitive tests in the hours afterwards than counterparts who did not nap.<\/p>\n
\n\tThe new study aimed to establish if there was a causal relationship between daytime napping and brain health.<\/p>\n
\n\tUsing a technique called Mendelian randomisation, they looked at 97 snippets of DNA thought to determine people’s likelihood of habitual napping. They compared measures of brain health and cognition of people who are more genetically “programmed” to nap with counterparts who did not have these genetic variants, using data from 378,932 people from the UK Biobank study, and found that, overall, people predetermined to nap had a larger total brain volume.<\/p>\n
\n\tThe research team estimated that the average difference in brain volume between people programmed to be habitual nappers and those who were not was equivalent to 2.6 to 6.5 years of ageing.<\/p>\n
\n\tBut the researchers did not find a difference in how well those programmed to be habitual nappers performed on three other measures of brain health and cognitive function – hippocampal volume, reaction time and visual processing.<\/p>\n
\n\tLead author and PhD candidate Valentina Paz (University of the Republic (Uruguay) and MRC Unit for Lifelong Health & Ageing at UCL) said: “This is the first study to attempt to untangle the causal relationship between habitual daytime napping and cognitive and structural brain outcomes. By looking at genes set at birth, Mendelian randomisation avoids confounding factors occurring throughout life that may influence associations between napping and health outcomes. Our study points to a causal link between habitual napping and larger total brain volume.”<\/p>\n
\n\tDr Garfield added: “I hope studies such as this one showing the health benefits of short naps can help to reduce any stigma that still exists around daytime napping.”<\/p>\n
\n\tThe genetic variants influencing our likelihood to nap were identified in an earlier study looking at data from 452,633 UK Biobank participants. The study, led by Dr Hassan Dashti (Harvard University and Massachusetts General Hospital), also an author on the new study, identified the variants on the basis of self-reported napping, and this was supported by objective measurements of physical activity recorded by a wrist-worn accelerometer.<\/p>\n
\n\tIn the new study, researchers analysed health and cognition outcomes for people with these genetic variants as well as several different subsets of these variants, adjusted to avoid potential bias, for instance avoiding variants linked to excessive daytime sleepiness.<\/p>\n
\n\tGenetic data and magnetic resonance imaging (MRI) scans of the brain were available for 35,080 individuals drawn from the larger UK Biobank sample.<\/p>\n
\n\tIn terms of study limitations, the authors noted that all of the participants were of white European ancestry, so the findings might not be immediately generalisable to other ethnicities.<\/p>\n
\n\tWhile the researchers did not have information on nap duration, earlier studies suggest that naps of 30 minutes or less provide the best short-term cognitive benefits, and napping earlier in the day is less likely to disrupt night-time sleep.<\/p>\n
\n\tPrevious research looking at the UK and the Netherlands found that nearly a third of adults aged 65 or over had a regular nap.<\/p>\n<\/div>\n
\n
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According to a new study conducted by academics at UCL and the University of the Republic in Uruguay, daytime napping may assist to protect brain function by slowing the speed at which our brains shrink as we age.
The study, published in the journal Sleep Health, analysed data from people aged 40 to […]<\/p>\n","protected":false},"author":1,"featured_media":75178,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_uag_custom_page_level_css":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[42],"tags":[50647,50648,50649,34863,50650,29208],"jetpack_publicize_connections":[],"class_list":{"0":"post-75177","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-healthfitness","8":"tag-daytime-sleep","9":"tag-napping","10":"tag-regular-daytime-sleeping","11":"tag-sleep","12":"tag-sleep-benefits","13":"tag-study"},"yoast_head":"\n
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According to a new study conducted by academics at UCL and the University of the Republic in Uruguay, daytime napping may assist to protect brain function by slowing the speed at which our brains shrink as we age.
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