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The Benefits of Sleep

November 15, 2018

So...sleep is kind of weird, right? It has always been, and will likely continue to be, a bit of a mystery.

 

From an evolutionary standpoint, it seems like something that we should have evolved out of a few hundred thousand years ago. The fact that we fall into a near comatose state for a third of our day, every single day, leaving us vulnerable to whatever horrifying dangers we faced in the early days of civilization, makes me wonder how we ever made it this far as a species.

 

But it just goes to show you that whatever sleep does for us, it’s obviously vital to our health and well- being. If it wasn’t, those individuals who needed less sleep would have risen to the top of the gene pool a long, long time ago, and those that thrived on a lot of sleep would have been, well, eaten most likely... 

 

Man, I'm pretty glad I'm alive now. Being eaten would suck.

 

As of yet, the scientific community hasn’t been able to tell us exactly why we sleep, but there is definitely a consensus among researchers (and new mothers) that adequate sleep is good for you in a whole bunch of ways.

 

 

Learning

We’re all familiar with the fact that we have a hard time focusing on information when we’re running on too little sleep. Absorbing information is only half the battle though.

 

Actually, if you really want to get technical, it’s only a third. Learning and memory are divided into three functions. Acquisition, consolidation, and recall. Put simply, you need to receive the info, then you need to stabilize the memory of it, and finally, you need to be able to access it when you’re watching “Jeopardy!” or in my life, playing HQ on my phone every night!

 

Acquisition and recall really only take place while you’re awake. Consolidation, on the other hand, “takes place during sleep through the strengthening of the neural connections that form our memories. The overall evidence suggests that adequate sleep each day is very important for learning and memory.”1

 

So even if you manage to focus on what you’re learning and acquire the information, without sleep, that information won’t be properly stored in the brain, and when called upon to access it, you’ll find yourself drawing a blank.

 

Now, I’m a firm believer that learning and education should be a lifelong pursuit, but once we’re out of school, learning becomes substantially more optional. For your kids though, learning is their primary responsibility for the first 18-20 years of their lives, so considering how much they need to retain, the importance of a healthy sleep schedule is pretty dang obvious.

 

 

Mood

 

We all know that when we don’t get enough sleep, we get short-tempered and irritable. A study from the University of Pennsylvania showed that subjects who experienced even partial sleep deprivation reported feelings of stress, anger, sadness, and mental exhaustion. 2

 

This isn’t exactly new information. We’re all aware that we get emotional in very negative ways when we’re running on too little sleep, but why? Why shouldn’t it have similar effects to say, a few glasses of wine? Why doesn’t sleep deprivation cause us to start telling people we love them or develop an overconfidence in our karaoke abilities?

 

Again, it’s a bit of a mystery, but some researchers have suggested that sleep deprivation stimulates activity in the amygdala. That’s the little almond-shaped part of the brain that’s responsible for feelings of, among other things, anger and fear.

 

These amped-up feelings can lead to an overall sense of stress and hostility towards others, which is probably at least part of the reason why you lost it at your co-worker when he asked you how your weekend was. The other reason being that he regularly uses finger guns and says things like, “Sounds like somebody’s got a case of the Mondays,” so sleep deprivation isn’t the only bad guy here.

 

Health

 

 

We can see how getting enough sleep is essential to learning and emotional well-being, but what about some more tangible benefits? Well, short of eating and breathing, you would be hard pressed to find anything with more health benefits than getting enough sleep.

 

“Sleep services all aspects of our body in one way or another: molecular, energy balance, as well as intellectual function, alertness and mood,” says Dr. Merrill Mitler, a sleep expert and neuroscientist at the National Institutes of Health. “Sleep affects almost every tissue in our bodies,”

 

People who regularly get between 7-9 hours of sleep see significantly lower rates of obesity, high blood pressure, stroke, infections, depression, diabetes, inflammation, hypertension, heart disease, heart attacks, and heart failure. They also report higher satisfaction with their sex lives, better performance at work, and take fewer sick days than people who typically sleep less than 7 hours a night.3

 

So there’s no question that sleep, while it remains mysterious, is definitely as essential part of a healthy, happy lifestyle. But that all changes when you have a baby, right? I mean, you’ve brought a new life into this world, and you’re expected to sacrifice your sleep for a few years, maybe six or seven at the most, in order to respond to your baby’s needs, which, for some reason, they seem to have in spades in the middle of the night.

 

This is, in my mind, the most problematic myth about parenthood, and one that needs to just stop being commonplace as advice doled out to new parents. Because here’s the thing; your baby needs sleep even more than you do. Those little bodies may look like they’re idle when they sleep, but there’s an absolute frenzy of work going on behind the scenes. Growth hormones are being secreted to help baby gain weight and sprout up, cytokines are being produced to fight off infections and produce antibodies, all kinds of miraculous, intricate systems are at work laying the foundation for your baby’s growth and development, and they’ll continue to do so through adolescence, provided they’re given the opportunity to do so.

 

Nature does the heavy lifting. All that’s required of your little one is to close their eyes and sleep. This being my field of expertise, I see a LOT of people telling new parents that babies just don’t sleep well, and that they should expect their little ones to be waking them up seven or eight times a night.

 

This is such detrimental advice to parents who feel like their drowning! Your advice isn’t just wrong, it’s harmful. Telling people to accept their baby’s sleep issues as a part of the parenting experience is preventing them from addressing the problem, and that’s a serious concern for everybody in the family. Not because they’re selfish and enjoy sleeping late. It’s because they, and even more so, their kids, need adequate sleep for all of the reasons I’ve listed above. 

 

And if your baby is waking up 7 or 8 times a night and crying until you come into the room and rock her back to sleep, that’s not necessarily motherhood-as-usual depending on the age of your child. That could be a big sign of a baby who has trouble sleeping, and it’s interfering with their body’s natural development. It’s no different than an ear infection or jaundice. It’s a health issue and it has a remedy, so anyone telling you to grin and bear it for the next six years is peddling horrible advice. I’m sure it’s not done maliciously, but it still needs to stop.

 

There is a new study out of McGill University 4 that shows no real correlation to lack of sleep and healthy development in the first year, and I would generally have to agree with that. Your baby will most likely be totally fine!!

 

However, the study also said that as long as parents can manage to get 6-8 hours, even if interrupted, there is no effect on mood....this HAS NOT been the case in my experience...and if your baby is up every hour and then needs to be rocked or held during the day to sleep I struggle to see how those 6-8 hours are happening. The big takeaway: if you're struggling it's absolutely ok to ask for help! If you're managing, that is awesome, I'm so very happy for you and I mean that sincerely!

 

Accepting inadequate asleep in infancy leads to accepting it in adolescence, and eventually you end up with grown adults who don’t give sleep the priority it requires, and all of those serious health issues follow along with it.

 

So to every new mother out there, I implore you, don’t accept the idea of sleep as a luxury that you’re going to have to learn to live without for a few years.


If your baby’s not sleeping, and you're struggling it's ok to address it. It’s not selfish, it’s not unrealistic, it’s necessary, and the benefits are prolific.

 

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Endnotes

  1. Division of Sleep Medicine at Harvard Medical School, retrieved from healthysleep.med.harvard.edu/ healthy/matters/benefits-of-sleep/learning-memory, December 18, 2007

  2. Sleep. 1997 Apr;20(4):267-77. Cumulative sleepiness, mood disturbance, and psychomotor vigilance performance decrements during a week of sleep restricted to 4-5 hours per night. Dinges DF1, Pack F, Williams K, Gillen KA, Powell JW, Ott GE, Aptowicz C, Pack AI.

  3. National Sleep Foundation, 2008 Sleep in America Poll, Summary of Findings retrieved from sleepfoundation.org/sites/default/files/2008%20POLL%20SOF.PDF

  4.  

    http://www.rcinet.ca/en/2018/11/13/infants-uninterrupted-sleep-research-mcgill/

     

     

     

     

     

     

     

     

 

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