{"id":1128,"date":"2019-01-29T20:17:22","date_gmt":"2019-01-29T20:17:22","guid":{"rendered":"https:\/\/www.heartbasedmedicine.org\/?p=1128"},"modified":"2025-09-23T12:01:54","modified_gmt":"2025-09-23T10:01:54","slug":"why-we-sleep","status":"publish","type":"post","link":"https:\/\/www.heartbasedmedicine.org\/en\/why-we-sleep\/","title":{"rendered":"Why We Sleep (and What Happens When We Don’t)"},"content":{"rendered":"\t\t
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If you don\u2019t mind me asking, when did you last get a good night\u2019s sleep? When I say \u2018good\u2019 I mean more than 7 hours, uninterrupted.<\/div><\/div>

Insomnia is a modern plague and most of us get far less than the recommended amount of 8 hours every night. <\/span><\/p>

The World Health Organisation has even recently declared a sleep loss epidemic throughout industrialised nations.<\/strong><\/h5>

Apart from the incessant demands of working, parenting, caring for a loved one, even socialising, many of us are helplessly attached to our digital devices, clocking up an average of 11 hours of daily screen time. <\/span><\/p>

With too much to think about and too many demands on our energy, shut-eye gets pushed to the bottom of our list of priorities when it should be firmly at the top. Our modern 24\/7 lifestyles, illuminated by artificial light, are pushing our natural rhythms to their limit. Since the beginning of the industrial age, humans have had to adjust their natural sleep times to fit around the working day. Whereas in pre-industrial agrarian cultures we would have slept from 9pm til dawn and enjoyed an afternoon nap of around thirty to sixty minutes, now we tend to just sleep at night, and that time window is getting shorter and shorter as we try to cram more into our day. Unless you live in a culture which still observes the siesta tradition, your afternoon nap is likely to have fallen by the wayside. Yet your body is still pre-conditioned to snooze mid-afternoon, a fact you\u2019ll be well aware of if you\u2019ve ever tried to sit through a boring presentation at 2pm!<\/span><\/p>

The medical culture expects doctors, nurses and surgeons to work some of the longest hours in any profession, knowing they are making life or death decisions with insufficient sleep which severely impairs judgment.<\/span><\/p>

Seeing medics, world leaders and CEOs boast about their ability to survive on 4 hours\u2019 sleep a night perhaps leads us to believe that it\u2019s a disposable commodity, something we can take or leave. Nothing could be further from the truth.<\/span><\/p>

Penguin has recently published <\/span>\u2018Why We Sleep\u2019<\/b>, an insightful and sometimes shocking book by Matthew Walker. It explores the science behind the mystery of our nightly power-downs and why they\u2019re so important for our health and wellbeing.<\/span><\/p>

The book reveals that as well as demolishing our immune systems over time, routinely getting less than 6 or 7 hours\u2019 sleep more than doubles our risk of cancer, reduces fertility and increases the risk of blocked arteries which can lead to cardiovascular disease, stroke and congestive heart failure. A person getting insufficient sleep for just one week will have their blood sugar levels disrupted so acutely, a blood test would diagnose them as being pre-diabetic. Add to this the hormone imbalance which a lack of sleep causes, making you crave more sugars and carbohydrates, and you can see why it\u2019s almost impossible to lose weight when you\u2019re sleep-deprived. Concentration and reaction times are one of the first casualties of not sleeping enough, leading to microsleeps and fatal injuries when driving or operating machinery. <\/span><\/p>

Very little research has been conducted in the past about why we sleep, so you\u2019d be forgiven for not knowing why it\u2019s so important to every living being. Sleep laboratories are now fortunately giving researchers far more insight into what actually happens when we close our eyes at night. <\/span><\/p>

Here\u2019s a brief summary:<\/b><\/h5>

First you will drop into a calm NREM sleep, a deep-wave state of repose that allows your brain to reflect on the day\u2019s events and process them. If it helps, visualise memory packets being moved from a short-term storage facility to a more secure long-term storage site within the brain. You will eventually move into REM sleep, a much more mentally active hallucinatory state accompanied by the release of a chemical which paralyses the body, presumably to stop our dreams being acted out. During this dreaming phase, emotions, memories and experiences will be integrated, helping you to solve problems creatively and fine-tune a more accurate model of the world. Your brain will cycle alternately through both these cycles during a full night\u2019s sleep, improving cognitive functioning such as balance, memory, learning and co-ordination when you wake up.<\/span><\/p>

Your brain is not the only organ to benefit from this deep cleanse.<\/span><\/p>

Shakespeare sums it up in <\/span>Macbeth<\/span><\/i> when he says that sleep is \u2018the chief nourisher in life\u2019s feast\u2019. <\/span><\/p>

A 2011 study that tracked half a million men and women of different age, race and ethnicity across 8 countries, resulted in the conclusion that shorter sleep (which raises blood pressure and calcification of the coronary arteries) was associated with a 45% increased risk of developing and\/or dying from coronary heart disease within seven to twenty-five years of the start of the study. Midlife predictions are even more startling. Adults aged 45+ who sleep fewer than 6 hours a night are 200% more likely to have a heart attack or stroke in their lifetime, compared to those sleeping seven to eight hours a night.<\/span><\/p>

During a good night\u2019s sleep, rich in NREM phases, the brain sends a calming message to the body\u2019s nervous system, reducing stress hormones, calming the heart and managing blood pressure. Ample sleep also replenishes the bacterial community known as the microbiome in your gut, rebalances the hormones necessary for reproduction, reduces inflammation and restocks the immune system so it can fight off infection and diseases. <\/span><\/p>

With all this evidence to support the benefits of a good night\u2019s sleep, you\u2019re probably interested to know how you get one!<\/span><\/p>

One of the fastest ways to improve your sleep is to go to bed and get up at the same time every day. Sorry, that includes weekends. Investing in a sleep tracking device such as a Fitbit, or the Oura Ring, \u00a0can to establish your baseline. Then learn to understand how long you\u2019re spending in each sleep phase.\u00a0<\/span><\/p><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

If you don’t mind me asking, when did you last get a good night’s sleep?<\/p>\n","protected":false},"author":6,"featured_media":5694,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"episode_type":"","audio_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","h5ap_radio_sources":[],"iawp_total_views":27,"footnotes":""},"categories":[86],"tags":[265,173,234,108,181,321,325,198,322,324,326,200,323,327,272,320],"media-category":[436],"typ":[431],"class_list":["post-1128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-read","tag-emotional-intelligence-in-healthcare","tag-emotional-well-being","tag-healthcare-transformation","tag-heart-based-medicine","tag-holistic-health","tag-importance-of-sleep","tag-mindfulness-and-sleep","tag-restful-sleep","tag-sleep-and-healing","tag-sleep-and-wellness","tag-sleep-for-mental-health","tag-sleep-hygiene","tag-sleep-science","tag-stress-reduction-and-sleep","tag-wellness-in-healthcare","tag-why-we-sleep","media-category-resources","typ-intern"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"acf":[],"yoast_head":"\nWhy We Sleep (and what happens when we don't) - Heart-Based Medicine Foundation<\/title>\n<meta name=\"description\" content=\"We all know what a "good nights sleep" can do for us. 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