Why We Sleep: The New Science of Sleep and Dreams by Matthew Walker
I’d heard about this book but didn’t feel compelled to get hold of it until David Lodge, one of my favorite authors, named it his book of 2017 in the TLS year-end roundup. I got an e-copy from NetGalley but then found the physical book on the bestsellers display in my local library and found that a more conducive format for skimming. It’s a fairly long and dense book, with smallish type and scientific figures, so I knew I was unlikely to read the whole thing, but enjoyed mining it for fascinating information about evolution, neuroscience and child development.
We often hear that sleep, diet and exercise are the three pillars of health, but Walker, a professor of neuroscience at the University of California, Berkeley, goes further: he believes sleep is the platform on which diet and exercise rest. Getting 7–9 hours of sleep a night is not some luxury to aim for but an absolute essential for the brain to process new information and prepare for receiving more the next day. Dreaming is like overnight therapy, and fuels creativity. Sleep deprivation has been associated with dementia and cancer: it’s no accident that Margaret Thatcher and Ronald Reagan, who prided themselves on getting by on just five hours of sleep a night, both developed Alzheimer’s. Just a few nights of insufficient sleep can weaken the immune system and increase the risks of developing a serious illness. It’s no wonder Walker calls sleep loss an epidemic.
Here are some other facts I gleaned:
- During primate evolution, the transition to sleeping on the ground instead of in trees meant we could sleep more deeply – not having to worry about falling out – and the resulting increase in REM sleep and dreams contributed to the development of complex culture and creativity.
- Fetuses are asleep most of the time; they kick in their sleep. Alcohol use during pregnancy or breastfeeding can lead to a decline in the offspring’s sleep quality or quantity.
- People with autism get 30–50% less REM sleep than neurotypical people.
- The postprandial slump in energy many of us experience is evolutionarily inbuilt, and suggests that a short nap (30–40 minutes) would be natural and beneficial. For instance, some African tribespeople still regularly nap at the hottest point of the day.
Walker’s sleep tips are mostly common-sense stuff you will have heard before. His #1 piece of advice is to have a sleep schedule, always going to sleep and waking up at the same time. (“Catching up” on weekends doesn’t work, though napping before 3 p.m. can.) Set an alarm for bedtime so you’ll stick to it, he suggests.
Making It Personal
I like my sleep, and I like my lie-ins. It’s one of many reasons why I don’t have kids. But I hoped that the older I got the better I’d be about waking up in the mornings. That hasn’t seemed to be the case. The past couple of weeks have been abnormal in that my husband has been working from home, too – he’s been on strike from the university and/or keeping clear of the snow – but on an average weekday, when the alarm goes off at a time starting with a 6, I feel like I could sleep for hours more. I usually cover my head with a pillow and stay in bed with the cat curled against my legs for an extra half-hour while my husband showers and starts getting things ready; only when I hear the tea being poured do I finally extricate myself from the covers and lurch downstairs to eat breakfast and make our sandwiches for the day.
One of my bibliotherapy prescriptions was The Artist’s Way by Julia Cameron, a 12-week set of readings and exercises – chiefly 20 minutes of automatic writing each morning and creative “dates” you take yourself on. For the former, you set your alarm half an hour early each day and fill three longhand pages with whatever comes to mind. It’s not a journal; it’s more a way of processing what’s going on in your life, gradually moving from mundane thoughts about daily pressures to more creative stuff. But if I can’t wake up for our regular alarm, how in the world would I get up even earlier to commit to this creative exercise? I’ve wondered if I could cheat a bit and do the pages after a short nap in the early afternoons, but I think the idea really is to put down whatever comes into your head first thing every morning.
I can see that this would be a good discipline, especially as I come up to my fifth anniversary of freelancing and take stock of my career. I just don’t know if I can make myself do it.
Have you read anything about sleep, creativity or mindfulness recently?
Also on my TBR to be skimmed:
- 24/7: Late Capitalism and the Ends of Sleep by Jonathan Crary
- The Business of Sleep: How Sleeping Better Can Transform Your Career by Vicki Culpin, a TEDx speaker and professor of organizational behavior [forthcoming on May 8th from Bloomsbury Business]
- The Secret World of Sleep: The Surprising Science of the Mind at Rest by Penelope A. Lewis
- Dreamland: Adventures in the Strange Science of Sleep by David K. Randall