Electric Sleep: The Gadgetry Tracking and Hacking The Way We Rest

As activity tracking goes mainstream, an arsenal of consumer technology is rolling out for sleep. But how much do these interventions help?

At 2.16am, I stumble to the bathroom. I catch a glimpse of myself. The light from the red bulb is flattering – I’ve been told to eliminate all blue light on my nocturnal trek – but the sleep-tracker headband, currently emitting the sound of gently lapping waves, kills any woke-up-like-this vibe. I adjust its double straps and feel my way back to bed.

The next time I wake is at 6.30am – after fractured dreams in which the Dreem 2 headband makes many cameos – to birdsong, also from the headband. When I check the app, I see I have slept six-and-a-half hours of my anticipated eight. Anxious to remedy this, I head out for my first coffee. In his new book Blueprint: Build a Bulletproof Body for Extreme Adventure in 365 Days, athlete Ross Edgley warns that this sort of overriding behaviour can bring about “biochemical bankruptcy”. Not now, Ross.

Health influencers like Edgley are all over sleep lately, and no wonder, when so many of us obsess over it. A 2021 report released by the Sleep Health Foundation estimates around one in 10 Australians have a sleep disorder, while a report from 2019 found that more than half are suffering from at least one chronic sleep symptom. Studies have suggested that sleep deficiency can lead to weight gain and a weakened immune system and that poor sleep patterns may contribute to later dementia risk.

In recent years, sleep-fretting has intersected with fitness-tracking, with the latest bio-hacks regularly featured on the podcasts of personal-development heavyweights such as Joe Rogan, whose Whoop Strap – worn around the wrist – told him he was getting four or five hours a night, not the seven or eight he’d thought; and Aubrey Marcus, whose Oura ring measures various biomarkers overnight and gives him a total score in the morning. “If I can get close to 80%, I’m golden for the day,” Marcus told the authors of My Morning Routine.

Wearables, such as watches, rings and headbands, appeal to those of us who enjoy geeking out on our stats, but could they also be cultivating anxiety and feeding into insomnia? Associate Prof Darren Mansfield, a sleep disorders and respiratory physician who is also deputy chair of the Sleep Health Foundation, thinks some balance is needed.

“These devices in general can be a good thing,” he says. “They’re not as accurate as a laboratory-based sleep study, but they are progressing in that direction, and technology enables the person to be engaged in their health. Where it can become problematic is people can become a bit enslaved by the data, which can lead to anxiety or rumination over the results and significance. That might escalate any problems, or even start creating problems.”

As a clinician, Mansfield thinks that the most useful role of these devices is monitoring routine, not obsessing over the hours of good-quality sleep. “There will be some error margin, but nonetheless when we’re looking for diagnostic information, like timing of sleep and duration of sleep, they can capture that,” he says.

Since Mansfield admits his sleep doesn’t need much hacking, I seek out an insomniac-turned-human guinea pig. Mike Toner runs the dance music agency Thick as Thieves, and has been on a mission for five years to fix the sleep issues earned from a decade of late nights in Melbourne clubs and reaching for his phone to answer international emails at 3am.

“I tried everything,” he says. “Magnesium capsules and spray, melatonin and herbal sleep aids. I even signed up for treatment at a sleep centre. You sleep in this room with all these wires connected to you, things coming out of your nose, cameras trained on you. Ironically, I slept better that night than I have any other night.”

He decided to start monitoring his body in earnest, learning about the latest devices from the Huberman Lab Podcast and The Quantified Scientist. Sleep-monitoring wearables have progressed from having an accelerometer to track movements which are fed through an algorithm to predict when a person is asleep, to being able to track sleep latency; sleep efficacy; heart-rate variability; light, deep and REM sleep and sleeping positions.

Toner’s accumulated a few as the technology becomes more sophisticated. He estimates having spent around $1,500 on them, and a further $3,500 for the sleep-centre treatment.

Then there are the cooling devices. Toner beds down on a Chilipad as soon as the weather gets warmer – a hydro-powered cooling mattress.

The idea is that lying down in a cool room – perhaps after taking a warm shower – tricks the body into slumber, since our body temperature drops when we’re asleep.

Non-techy strategies include having hands and feet out from under the covers, or using a fan. Lifestyle guru and entrepreneur Tim Ferriss recommends a short ice bath before bed. Be warned, though: Dave Asprey – founder of Bulletproof, which sells high-performance products – once tried putting ice packs on his body right before bed. As he told MensHealth.com: “I ended up getting ice burns on about 15% of my body.”

Mansfield says that ensuring you’re cooler in the evenings may help with sleep. “Generally, a lower-level temperature is better tolerated at night … 25C can make a beautiful, comfortable day, but can be unbearably hot at night when our own core temperature drops, so 18C or 19C is more tolerable.

“Then in the last two hours before getting up, your temperature rises again – you might have thrown off the blanket in the night and then might wake up at 5am feeling freezing cold.”

And what about the new frontiers of technology? According to neuroscientist Matthew Walker, in his influential book Why We Sleep, in the future, we can expect the marriage of tracking devices with in-home networked devices such as thermostats and lighting.

“Using common machine-learning algorithms applied over time, we should be able to intelligently teach the home thermostat what the thermal sweet spot is of each occupant in each bedroom, based on the biophysiology calculated by their sleep-tracking device,” Walker says. “Better still, we could program a natural circadian lull and rise in temperature across the night that is in harmony with each body’s expectations.”

Mansfield thinks this kind of integration is feasible, and that a thermostat linked to a device measuring circadian rhythms offers plausible benefits in preparing people’s sleep, but he predicts that automated control of room lighting will wind up being manually overridden, because technology can’t necessarily gauge when we’re in the middle of reading a book or having a conversation. “It’s liable to just irritate people,” he says. He’s more interested in technology that will track conditions like sleep apnoea.

As Toner has concluded, no device is a silver bullet. Ultimately, it was a $70 online cognitive behavioural therapy (CBT) course that his GP referred him to that fixed his sleep over three months of strict adherence. Now he just uses technology to make sure he’s not drifting off track.

The key lessons? Only use your bedroom for sleep and sex. Set your alarm for the same time, no matter how late you get to bed. Screens off early. No day-napping. Alcohol is a bad idea. All of these things are easily monitored yourself using a good old notebook, and they don’t cost a cent. They just take persistence.

With those good habits in place, Toner is now mindful of how he will put the CBT pointers he’s learned during lockdowns into practice once his life picks up its pace again.

“I used to put this obligation on myself to be there all the time with my artists, but interestingly, coming out of this pandemic, a lot of the artists are having the same train of thought as I am, wanting to avoid late nights,” Toner says.

He’s even coaching some of them for a charity run – quite the lifestyle change for many. “I’ve spent so long fixing this that one of the things I’ve realized, when we eventually go back to work routines, is I’m going to be fiercely protective of my sleep.

By:

Source: Electric sleep: the gadgetry tracking and hacking the way we rest | Sleep | The Guardian

.

Related Contents:

What is sleep tracking, how does it work and what devices offer it

Do Sleep Trackers Really Work

What Is a Sleep Tracker and Why Would You Need One

Orthosomnia: Are Some Patients Taking the Quantified Self Too Far

The Sad Truth About Sleep-Tracking Devices and Apps

SleepBot – Smart Cycle Alarm with Motion & Sound Tracker

SleepBot includes a “smart alarm” feature which has been failing on Android 6.x “Marshmallow” due to “Doze” mode.

Collecting Data on a Good Night’s Sleep

Meet Sleepbot, the fast-growing sleep tracking app with a over a million users

Sleep-tracking apps: Sleep Cycle v SleepBot

off-the-companies-introducing-nap-time-to-the-workplace “Clocking off: the companies introducing nap time to the workplace

Dreams of the future: How sci-fi sees sleep

Airport Sleep Pods Are Here for Stranded Passengers

Sleeping through Class to Success

Dementia and sleep deprivation linked in recent study – The Washington Post

Sleep deprivation has been linked to hypertension, obesity and diabetes and has long been suspected of having a connection to dementia. Now, a large new study has more clearly established that association by concluding that people who sleep less than six hours a night in midlife have a greater risk of developing late-onset dementia.

That doesn’t mean middle-aged short sleepers should panic, according to experts. Although the study is an important step forward, much about the connection between sleep and dementia remains unknown, they said. Still, it can’t hurt to work on your sleep habits while research continues, and you’ll find some strategies listed below.

In the study, European researchers followed nearly 8,000 people in Britain for 25 years, starting when subjects were 50. They found that those who consistently got six hours of sleep or less per night in their 50s and 60s were about 30 percent more likely to develop dementia later in life, compared to those who logged seven hours of sleep per night. That was independent of “sociodemographic, behavioural, cardiometabolic, and mental health factors,” the study authors wrote. Findings were published in the journal Nature Communications in late April.

“This is just another example of the importance of appropriate sleep for brain health,” said Michael V. Vitiello, a professor of psychiatry and behavioral sciences at the University of Washington at Seattle and member of the SleepFoundation.org medical advisory board, who wasn’t involved in the study. “It’s really important for people to be conscious of making sure that they sleep well. It’s not trivial, and it shouldn’t be the last thing you think about. It shouldn’t be the thing you sacrifice.”

Lack of sleep might increase dementia risk by impairing learning and memory development, said study author Andrew Sommerlad, an old-age psychiatrist at University College London, or it could affect the brain’s ability to clear harmful protein waste products.

Researchers have spent years trying to understand the sleep-dementia connection, a quest that becomes more urgent as the number of people with Alzheimer’s disease balloons. More than 6 million Americans are living with the disease, according to the Alzheimer’s Association, and by 2050, that number is expected to reach nearly 13 million. Yet, it’s a difficult area in which to draw conclusions.

Earlier this year, Charles Czeisler, chief of the sleep and circadian disorders division at Brigham and Women’s Hospital in Boston, co-authored a similar study that found that adults age 65 and older who got five hours or less of sleep per night had double the risk of dementia than those who clocked seven or eight hours per night. Results were published in the journal Aging.

“At this point, it’s too early to say that behavior X leads to Y,” Czeisler said. “But the association certainly reveals the importance of continuing to study the relationship.”

One of the challenges to studying the link between sleep and cognitive decline is that it’s difficult to determine what happens first: Is too little sleep a symptom of the brain changes that often begin decades before cognitive problems appear? Or does it cause those changes? So far, that’s still unclear, said Claire Sexton, director of scientific programs and outreach with the Alzheimer’s Association.

“There’s mounting evidence pointing toward the relationship between sleep and dementia,” she said. “But there are a lot of unanswered questions. There’s no one factor that would guarantee someone will develop dementia, and there’s no one factor that will guarantee someone won’t.”

Vitiello lauded the new study’s lengthy follow-up period and examination of people in their 50s (most similar research focuses on those 65 and older). But he emphasized that the findings estimate increased risk for the entire population, not for any one individual. “These are predictions,” he said. “On average, if you have this kind of disturbed sleep, your odds go up this percentage. It doesn’t mean that just because you’re a 55-year-old sleeping under six hours a night, you’re guaranteed to have an increased Alzheimer’s risk of 30 percent.”

Exactly why someone is a short sleeper — for example, if they have insomnia, hold multiple jobs that require odd hours or naturally need less sleep — likely plays a role in their unique risk, he added. The study didn’t account for those factors.

Image without a caption

Source: Dementia and sleep deprivation linked in recent study – The Washington Post

.

More Contents:

Which fruits and vegetables don’t count toward your ‘5 a day’? New study has answers.

Morning or night? With food or without? Answers to your questions about taking supplements

Sleep Deprived Financial Traders Make Lower Stock Market Returns

Do financial traders make better returns in the stock market when they are well rested? You would intuitively assume that a trader’s level of sleep would affect their decision making.

Several studies have certainly shown that sleep affects the ability of people to make decisions in general. Though admittedly based on small samples of participants, these studies show that those who are short on sleep tend to have relatively low attention to detail, poor memory, poor performance and significant mood swings.

But when it comes to whether sleep affects financial decisions, the evidence has been mixed. The only measure of sleepiness that has been used is the annual clock changes for daylight saving that take place in many countries, since they disturb many people’s sleep. A few studies have used this to look at how stock market returns are affected on the Mondays directly after the clocks go back or forward by an hour.

One such study in 2000 concluded that returns were relatively low when traders lacked sleep, and suggested that the lack of sleep might make them more risk-averse because they were anxious and struggling to concentrate. But later studies, such as this one from 2002, suggested that the correlation between sleep and cautious investing might not be as strong empirically as initially thought.

My work

Daylight-saving time changes have the advantage that we all have to adjust them, but they are far from an ideal proxy for sleep since they only occur twice a year, and the impact on people’s sleep is relatively small since the clock only changes by an hour. This might explain why the research evidence has been mixed in this area.

To try and improve our understanding in this area, I undertook a pilot study of a fund manager in England, analysing his investment transactions in the context of sleep data that he recorded in a diary.

I found that his sleep patterns did indeed influence his investment decisions. In line with the theory from the 2000 study, the fund manager made fewer transactions when he was short on sleep.

To see whether there was a wider correlation, I sought to develop a new proxy for sleep. We know that around 80% of people search for information online about their health issues, and there is no reason to believe that investors behave any differently. I also knew that Google data has been used by researchers to measure investor attention to individual stocks.

I therefore created a sleepiness index based on the extent to which people in the US were searching Google for 28 relevant terms including “sleep deprivation”, “sleeping pills” and “jet lag cure”. Some of these terms came from allowing the Google algorithm to offer up potential sleepiness terms based on suggested autocompletes.

The more that people searched for things to do with sleepiness, the greater the indication of sleep difficulties. Unlike the time changes from daylight saving, my index has the advantage of being based on daily data, and can measure a much wider range of sleepiness. To test its validity, I checked the index against times that we would normally associate with sleepiness, including daylight-saving time changes and also sunrises and sunsets. Sure enough, sleepiness-related Google searches increase at these times.

The index confirmed that stock-market returns are indeed quite low on days that traders are short on sleep. For every 1% daily increase in sleep difficulties across the population, stock-market returns fell by 0.14%. I also found that these patterns reversed on subsequent days, which may mean that traders realise that their initial decisions were poor and take steps to correct them.

What next from a research point of view? Researchers could potentially use the data from sleep apps to get more accurate measures of the relationship between stock market returns and the population’s sleepiness over time. No doubt the better we understand this, the more that traders will be able to use it to their advantage.

My work is another example of how online search data can shed new light on old research subjects. There are surely lots of other ways in which the academic community can use it to understand other factors that influence our decisions.

By: Antonios Siganos  Senior Lecturer in Finance, University of Glasgow

Source: Sleep-deprived financial traders make lower stock market returns – new research

.

.

More Contents:
Harmonium Sleep Support – The Top Sleep Supplement On CB
sites.google.com – Today[…] Crisis Led To A Shocking “Backyard” Tea Discovery That’s Now Helping Thousands Of Exhausted, Sleep-deprived 3 A […]18

Revision Supplement Review – Improving Your Eyesight & Memory Fast.
http://www.reviewsgoal.com – Today[…] If you are sleep-deprived, then you do not need to worry at all […]0

Tips on preparing for the switch to Daylight Saving Time
http://www.citynews1130.com – Today[…] ” Lu says those who are already sleep-deprived and children who rely on strict routines will be hardest hit […]2

The World According to Michael Coorlim
player.captivate.fm – Today[…] You know when you start feeling sleep deprived, how the world doesn’t feel real anymore? But then we figured out the cost to actually produce th […]N/A

Sleep Hygiene
ipccontent.advisorstream.com – Today[…] in order to get more things done or to rely on a cup (or more) of coffee to keep you going when sleep deprived […]0

Your Daylight Saving Time Questions Answered – The New York Times
http://www.nytimes.com – Today[…] “Not only are we sleep deprived but we’re trying to force our brain into a little bit more of an unnatural sleep schedule,” said Dr […]4

Acknowledging Preindustrial Patterns of Sleep May Revolutionize Approach to Sleep Dysfunction
http://www.psychiatrictimes.com – Today[…] that under our current conditions, we may fall asleep so quickly because we are chronically sleep-deprived […] Are we chronically sleep deprived? Bull Psychonomic Soc […]2

‘Almost inhumane’: Treating the complex problem of physician fatigue
http://www.tvo.org – Today[…] I completely forgot to check on this, because I was so sleep-deprived […]5

Chick-fil-A Opens In Linden: Top News Of The Week | Clark, NJ Patch
patch.com – Today[…] Aside from being sleep deprived, she finds this […]1

6 ways to feel less tired after daylight saving 2021
http://www.reviewed.com – Today[…] “We tend to crave sweets when we’re sleep-deprived,” Aronson says […]1

As Bipartisan Bill Moves To End Daylight Saving Time, A Review Of Why It’s So Bad For Our Health
gothamist.com – Today[…] even more: this Mayo Clinic found that DST could lead to “an increase in medical errors” because of sleep-deprived healthcare workers […]7

Belfast named as UK’s most sleep-deprived city – BelfastTelegraph.co.uk
http://www.belfasttelegraph.co.uk – Today[…] In a report compiled by a UK mattress firm, Belfast was picked as the most sleep-deprived city in the UK […] Between the start of 2020 and 2021, searches for sleep-deprived terms were said to have increased by nearly a third (30%) […]15

Four incredible benefits of CBD oil for dogs – FingerLakes1.com
bestcann.com – Today[…] When serotonin levels are low, canines become sleep-deprived, unhappy, and less sociable […]N/A

We must work together to make kitchens more inclusive
http://www.sodexo.com – Today[…] a global movement fighting for a more resilient and sustainable industry, 74% of chefs feel sleep deprived to the point of exhaustion; 53% of chefs feel pushed to breaking point; and 1 in 4 chefs ha […]0

Review Finds LAPD Failures Led to Mishandling of Summer Civil Unrest
http://www.asisonline.org – March 12[…] If they are sleep deprived, decision making could be impacted, which then has the potential to affect the success of th […]0

10 WEIGHT LOSS Life Hacks to LOSE WEIGHT FAST and EASY! (Tips That Actually Work)
thebestwaystoloseweight.net – March 12[…] habits can cause you to gain weight for one your metabolism does not function properly when you’re sleep-deprived secondly “youve had” the starvation hormone ghrelin that tells you when to eat when you hav […]0

TEA-rrific Creatures
http://www.sophsscrawls.co.uk – March 12It all started one early sleep deprived morning, whilst making a cup of tea I dropped the rather hot tea bag onto my open sketchbook […]0

Large cognitive fluctuations surrounding sleep in daily living
http://www.cell.com – March 12[…] Body posture affects electroencephalographic activity and psychomotor vigilance task performance in sleep-deprived subjects […] Cognitive performance, sleepiness, and mood in partially sleep deprived adolescents: the need for sleep study […]0

Light painting 101: Five easy steps to illuminating cyanide tanks carved with guerrilla art
photofocus.com – March 12[…] to weird music, stay out all night creating photos, get dirty, hang out with other creative sleep-deprived weirdos, see the stars drift across the sky and always find the best taco stands whil […]3

A year of the pandemic in your words – the examined family
courtney.substack.com – March 12[…] I have felt a deep darkness I have only experienced once before in my life, when chronically sleep deprived after my second child was born and wouldn’t sleep through the night for a year and a half […]2

Belfast people have more trouble sleeping than anywhere else in the UK, new study shows
http://www.irishpost.com – March 12[…] The study found that for every 100,000 people in Belfast, sleep-deprived terms were searched for 1,931 times […]1

5 reasons we won’t be giving up our weekend lie-ins right now
http://www.independent.co.uk – March 12[…] However, if it becomes a ‘need to have’ because we’re sleep deprived during the week, that’s a concern […]2

J.K. – Identity Crisis – Track by Track
1883magazine.com – March 12[…] I actually initiated the writing of this song when I was extremely sleep deprived, and I almost forgot (while compiling the track list) that I wrote it […]0

The Importance of Sleep for Kids
http://www.sleepgallery.biz – March 12[…] We all know what it’s like to attend an important class or meeting while sleep deprived […]1

Sleep maximizes vaccine effectiveness
medicalxpress.com – March 12[…] Up to 10 days later, the sleep-deprived individuals possessed half the number of vaccine antibodies than the non-sleep-deprived controls […]N/A

Sleep Maximizes Vaccine Effectiveness
http://www.newswise.com – March 12[…] Up to 10 days later, the sleep-deprived individuals possessed half the number of vaccine antibodies than the non-sleep-deprived controls […]N/A

Mental health and alcohol/drug use during the COVID-19 pandemic
positivechoices.org.au – March 12[…] “Let’s talk about sleep”: a qualitative examination of levers for promoting healthy sleep among sleep-deprived vulnerable adolescents […]145

Is Melatonin Safe to Take Every Night

Americans aren’t sleeping well. Roughly 80% of U.S. adults say they struggle to fall asleep at least one night a week, according to a recent Consumer Reports survey. And research has found that sleep problems are also on the rise among adolescents.

While the causes of America’s sleep woes are up for debate, there’s little disagreement about America’s favorite remedy: Melatonin, by far the country’s most-used sleep aid.

What is Melatonin?

Melatonin is a hormone that plants and animals, including humans, produce naturally. The melatonin sold in over-the-counter pills is synthetic, but chemically it’s the same as the stuff the human body makes. It can, if used properly, help certain problem sleepers get to bed at night. Melatonin hormone secreted by pineal gland (red) at night, regulates body’s daily biological rhythm depending on luminosity as light regulates its secretion via a path involving the suprachiasmatic nucleus (green), the paraventricular nucleus (yellow) and the preganglionic sympathetic neurons. BSIP/Universal Images Group via Getty

Research has also shown it can help combat inflammation, promote weight loss, and maybe even help children with neurodevelopmental disorders. That’s a lot to claim, though there are some studies to back up the various benefits. One 2011 review found evidence that, in children with autism, melatonin supplementation led to improved sleep and better daytime behavior. A small 2017 study from Poland found that obese adults who took a daily 10 mg melatonin supplement for 30 days while eating a reduced-calorie diet lost almost twice as much weight as a placebo group. The underlying cause might be connected to the fact that blood measures of oxidative damage and inflammation were much lower in the people who took melatonin.

“Some of the emerging science is showing that in people with higher levels of inflammation—which could be because they’re obese, or because they’re in the [intensive care unit] for a transplant—melatonin in the range of 6 mg to 10 mg may decrease markers of inflammation,” says Helen Burgess, a professor of psychiatry and co-director of the Sleep and Circadian Research Laboratory at the University of Michigan. If someone is healthy, it’s not clear that high-dose melatonin has a similar anti-inflammation effect, she adds. But it’s possible.

Burgess is one of the country’s foremost melatonin researchers. She says that the traditional view of melatonin is that it plays a role in regulating the body’s internal day-night clocks, which is why it can help people sleep. “But there’s a theory that melatonin’s original purpose was as an antioxidant, which is what it does in plants,” she says. This alternative theory holds that it was only later in human evolution that melatonin took on a secondary role as a biological clock-setter.

Inflammation, like poor sleep, is implicated in the development or progression of an array of diseases, from heart disease and diabetes to depression and dementia. If melatonin could safely promote both better sleep and lower rates of inflammation, it could be a potent preventative for a lot of those ills. And melatonin appears to be safe—though there isn’t much research on the long-term effects of taking it in heavy doses.

What is a safe melatonin dose?

According to Michael Grandner, director of the Sleep and Health Research Program at the University of Arizona, “melatonin is very safe if taken in normal doses,” which is anything between 0.5 mg and 5 mg.

A 0.5 mg dose may be all that’s needed for sleep-cycle regulation, and should be taken three to five hours before bed, he says. For people who want to take melatonin just before bed, a 5 mg dose is appropriate. “Some people report headaches or stomach problems at higher doses, but those side-effects are uncommon,” he says.

Still, there are other concerns. “Melatonin has an incredible safety record, no doubt about it,” says Dr. Mark Moyad, the Jenkins/Pomkempner director of preventive and alternative medicine at the University of Michigan. “But it’s a hormone, and you don’t want to mess around with hormones until you know what they’re doing.”

People with existing medical problems should discuss melatonin with their doctor before using it. While some research has found that melatonin may help treat hyperglycemia in people with diabetes, for example, other studies have shown that, in diabetes patients who carry certain genetic traits, melatonin may interfere with glucose regulation. It’s these sorts of contradictory findings that give experts pause when it comes to issuing melatonin a full-throated endorsement.

“My advice is always to treat supplements like drugs, meaning don’t take a pill unless you need a pill,” Moyad says. He urges restraint with melatonin not because there’s evidence it’s dangerous, but because of the lack of evidence showing it’s safe in high doses over long periods. Especially for parents who are giving melatonin to healthy children, Moyad says caution is warranted. Melatonin appears to be safe, and it could provide a range of health benefits. But there are a lot of unknowns.

By Markham Heid

.

.

Watch more, Matthew Walker Busts Sleep Myths: https://www.youtube.com/watch?v=oDRrR… Why We Sleep is out now: https://amzn.to/2JugGKV Sleep is one of the most important aspects of our life, health and longevity and yet it is increasingly neglected in twenty-first-century society, with devastating consequences: every major disease in the developed world – Alzheimer’s, cancer, obesity, diabetes – has very strong causal links to deficient sleep. In this book, the first of its kind written by a scientific expert, Professor Matthew Walker explores twenty years of cutting-edge research to solve the mystery of why sleep matters. Looking at creatures from across the animal kingdom as well as major human studies, Why We Sleep delves into everything from what really happens during REM sleep to how caffeine and alcohol affect sleep and why our sleep patterns change across a lifetime, transforming our appreciation of the extraordinary phenomenon that safeguards our existence. Find out more: https://www.penguin.co.uk/articles/20… Watch a full interview with Dr Rangan Chatterjee on the Feel Better, Live More podcast: https://youtu.be/_N8zlEs6XVk ————————————————————————- Subscribe to the Penguin channel: http://po.st/SubscribePenguinYouTube Follow us here: Twitter | http://www.twitter.com/penguinukbooks Website | http://www.penguin.co.uk Instagram | http://www.instagram.com/penguinukbooks Facebook | http://www.facebook.com/penguinbooks

.