Wednesday, March 11, 2020

Should You Track Sleep?

man sleeping with sleep tracker deviceTracking certain things makes sense, if you go for that sort of thing. Tracking step count is hard without a device. No one’s going to count every step they take in their head. You’d quickly go mad doing that. Same with pulse rate and heart rate variability—you could count the number of beats for 30 seconds and double it to get BPM, but that gets unwieldy after awhile and HRV requires a special device. But tracking sleep? On the surface, sleep tracking seems futile and pointless. If there’s anything you should know intuitively without having to measure, it should be whether or not you got a good night’s sleep. You wake up and see how you feel.

Are you groggy? Irritable? Did you just crack an egg into the coffee maker, brush your teeth with light roast beans, kiss your dog good morning and let your spouse out to pee? You probably didn’t sleep very well.

Are you rested? Full of vim and vigor? Can you perform basic bodily functions without requiring a mug of coffee first thing? You probably slept fine.

Many people are fine with that much information. I’m one of them, actually. If I slept well, I slept well. But the argument for sleep tracking is more nuanced than that. It’s not just about knowing how well you sleep from night to night (which you can usually tell just from how you feel).

It’s about tracking how your daily actions, behaviors, exercise patterns, light exposure, food timing, and alcohol intake correlate with the quality of your sleep using actual numbers.

It’s about identifying the amount of deep sleep, REM sleep, and non-REM sleep you’re getting every night—and then using that information to make necessary changes.

Yes, with accurate sleep tracking, a person can do lots of things:

You can run experiments.

If you think something you’re doing, eating, taking, or implementing might be affecting your sleep, you can test it out. Eat the food/have the meal at said time/take the supplement/do the workout/etc. and track how you sleep. Remove the stimulus and track sleep again. What happened?

You can reinforce better behavior.

Sometimes it’s not about the accuracy of the device or the specific features of the device. It’s the simple act of measuring your sleep, thinking about your sleep, focusing on your sleep that compels you to get serious. It’s forking over a few hundred bucks on a sleep tracking device that finally gets you committed to a consistent sleep schedule. It’s the sunk cost of both attention and money.

You can discover triggers you weren’t even looking for.

When I asked people on Twitter about their biggest takeaways from using sleep tracking devices, one of the most popular answers was discovering a behavior, food, or exercise pattern that was hurting their sleep. Some named alcohol after 6p.m. Some named eating too large a meal after dark. Others mentioned too much exercise, or too little. The point is that people were using these devices to learn something about their own bodies. About what made them tick. They were gaining actionable information.

If you don’t have a strong intuitive relationship with your sleep, you can learn to develop it.

Many people have lost touch with their bodies. Using accurate trackers (like sleep trackers) can provide solid data that you can use to “sync up” with your subconscious intuition. Biofeedback can really help you become more intuitive, a better “body listener.”

At least, that’s how it’s supposed to work. That’s assuming the device you’re using is accurate. Are they?

A 2017 paper compared the accuracy of an OURA Ring to traditional polysomnography (the gold standard for tracking sleep cycles, waking, and sleep time) in a group of teens and adults.

  • The OURA ring was pretty good at tracking total sleep time (87.8% accuracy) and waking after sleep onset time (85.4% accuracy).
  • It faltered when tracking light sleep (65% accuracy), deep sleep (51% accuracy), and REM sleep (61% accuracy).

Overall, it’s good as a total sleep time tracker, but not as impressive as a sleep cycle tracker.

In teens, researchers compared the accuracy of a FitBit Alta HR and a Philips Respironics ActiWatch2 (two wrist wearables) to traditional polysomnography. Both consumer devices were accurate in tracking sleep duration but not sleep staging, which, “would benefit from further refinement before these methods can be reliably used for adolescents.”

In adults, the FitBit Charge 2 was compared to polysomnography. The FitBit:

  • Showed 96% accuracy to detect sleep, 61% accuracy to detect wake, 81% accuracy in detecting light sleep, 49% accuracy in detecting deep sleep, and 74% accuracy in detecting REM sleep.
  • Overestimated total sleep time by 9 minutes and light sleep by 34 minutes, and underestimated deep sleep sleep by 24 minutes.
  • Accurately estimated REM sleep duration.

Another study had similar findings, concluding that commercial sleep trackers are good enough for tracking sleep time and time in bed.

Some of these devices track more than just sleep duration and cycles (however accurately). For instance, the OURA ring also has a body temperature sensor, a heart rate variability monitor, and a heart rate tracker because all three biomarkers—body temp, HRV, and HR—can give insight into how a person is sleeping.  Are they accurate?

According to a recent study in women, the OURA Ring could detect menstrual shifts with 72–86% accuracy and ovulation periods with 83% accuracy by using nocturnal body temperature readings.

A newish wrist wearable called WHOOP was recently tested against polysomnography and actually did quite well:

  • It tracked deep sleep with 85% accuracy and REM sleep with 74% accuracy.
  • It got breathing rate within 1 breath per minute and pulse rate within 1 BPM of reality.

Plus, the adults using WHOOP reported improved sleep quality.

There are definitely problems with most of the current devices. They’re not as accurate as medical trackers. They rarely muster up to polysomnography. But they’re good for tracking overall sleep duration, and they’re getting better at tracking sleep stages. I imagine at some point in the near future we’ll have consumer devices that rival the medical ones.

And some of the newer ones, like the OURA Ring and WHOOP, can also track respiration rate and heart rate variability, which give insight into not just how you’re sleeping but also general preparedness and stress tolerance. I’ve explained the merits of HRV in the past, and although I’m not a devoted HRV-tracker, I recognize its usefulness. If I were an athlete again, I’d get a lot of use out of tracking my heart rate variability and having a “readiness” number waiting for me upon waking.

But overall, I’m not sold on their necessity

Imagine this: You get the newest, bestest tracker to finally figure out what makes a good night’s sleep. Except things get weird.

On the days you feel exhausted, your tracker reports the previous night’s sleep as having been exemplary.

On the days you feel rested, your tracker reports poor sleep.

Who are you going to believe? The tracker or your own experience?

This mismatch can throw off your ability to derive value and insight from the device. On the day you feel exhausted but should be rested according to the tracker, you ate a large meal at night with a glass of wine. On the day you feel rested but should be exhausted according to the tracker, you ate a small supper and had sparkling water instead of wine. Which nighttime routine will you pursue? Will you trust the numbers of your own intuition?

How you respond to this disagreement—who or what you believe—will have major ramifications for the rest of your day.

If you feel rested but the tracker says you slept terribly, you just might be inclined to believe the tracker. Do that often enough and you could become conditioned to feel dissatisfied with “good sleep.” You could nocebo yourself out of appreciating a good night’s sleep, or worse.

In one sleep study, what the researchers told participants about the quality of the sleep they’d had the night before had a greater influence on cognitive performance than how they actually slept. If they slept well but were told they slept poorly, they performed poorly. If they slept poorly but were told they slept well, they performed better.

Or—and I’ve seen this happen—you could become wedded to the numbers. That if you’re not able to track and validate a good night’s sleep and post the results to your Instagram account, it didn’t happen. I’ve heard from people who end up waking up in the middle of the night, stressing out over the quality of their sleep. Will the dog waking me up to go pee show up in next morning’s report and ruin my record for the week?

I have my leanings. As I said earlier, if I were a competitive athlete again, I’d probably be more inclined to give a sleep tracker a shot, especially if it had great accuracy and HRV capability. But this isn’t about me. It’s about what’s right for you.

Are you an intuitive who likes to feel things out and go with the flow, listen to your body?

Are you a number-cruncher who likes quantifying as much of the human experience as possible?

Most of us are a mix of both. It all depends on you—what makes you tick, what gets you going, what your goals are.

So, tell me, folks: Do you use a sleep tracker?

What do you get out of it?

What don’t you like?

Can you recommend any specific devices or apps?

Sell me on it. Or do the opposite. Make your case!

Thanks for reading, everyone. Take care and be well.


De zambotti M, Rosas L, Colrain IM, Baker FC. The Sleep of the Ring: Comparison of the ?URA Sleep Tracker Against Polysomnography. Behav Sleep Med. 2017;1-15.

Lee XK, Chee NIYN, Ong JL, et al. Validation of a Consumer Sleep Wearable Device With Actigraphy and Polysomnography in Adolescents Across Sleep Opportunity Manipulations. J Clin Sleep Med. 2019;15(9):1337-1346.

De zambotti M, Goldstone A, Claudatos S, Colrain IM, Baker FC. A validation study of Fitbit Charge 2™ compared with polysomnography in adults. Chronobiol Int. 2018;35(4):465-476.

Lee JM, Byun W, Keill A, Dinkel D, Seo Y. Comparison of Wearable Trackers’ Ability to Estimate Sleep. Int J Environ Res Public Health. 2018;15(6).

Maijala A, Kinnunen H, Koskimäki H, Jämsä T, Kangas M. Nocturnal finger skin temperature in menstrual cycle tracking: ambulatory pilot study using a wearable Oura ring. BMC Womens Health. 2019;19(1):150.

Berryhill S, Morton CJ, Dean A, et al. Effect of Wearables on Sleep in Healthy Individuals: A Randomized Cross-Over Trial and Validation Study. J Clin Sleep Med. 2020.


The post Should You Track Sleep? appeared first on Mark's Daily Apple.

from Mark's Daily Apple

How I Am Supporting My Immune System Right Now

This week I was supposed to be in California attending the biggest natural products show in the U.S.

I prepared weeks for this show. Everything from lining up meetings, to preparing frozen meals to take with me for my daughter to eat while I was busy working and lots and lots of packing!

It was stressful but it was going to be so worth it. Truvani was going to have their first booth at this major trade show. 

But on Monday night right as I finished putting all the last minute things in my bag, I got a text.

The trip was cancelled because of the global health emergency going on right now. 

When I told my daughter we weren’t going to California – she looked at me and almost cried. And I did too.

Health scares always make me think about my overall health and mortality. And it reminds me of why I got into eating better in the first place. 

It all started with a hospital trip. Even though it was for something that was completely out of my control, it made me realize that I was ignoring my overall health.

Then, everything changed.

I started blogging about food and ingredients on Food Babe. I also launched my company Truvani, where I sell remarkable supplements. 

And given this entire situation, I thought I would share some of the things I currently do each day to support my health: 

  1. Washing my hands every chance I get with basic natural soap (not Clorox wipes) 
  2. Getting movement everyday, even if it’s just a walk to the playground
  3. Sleeping for at least 8 hours each night by not staying up late surfing and reading all the bad news!
  4. Eating lots of fruits and vegetables – I love eating golden berries (full of Vitamin C) instead of sugar-filled snacks to curb my sweet tooth.
  5. Taking my immune-support supplements religiously (like Vitamin D, Vitamin C, Under The Weather which has Elderberry).

We are also running a sale on some of our newest products, specifically Under The Weather, Vitamin C, and Vitamin D. 

I love taking these – not only because they are organic and the best in class – but because they give me peace of mind that I am doing everything I can. 

Here’s to staying sane and healthy in this trying time. 



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from Food Babe

A Day In The Life: Mompreneur

Missing old school KERF? Here’s a day in the life of a Mompreneur for ya!!


My alarm goes off playing Taylor Swift’s Wildest Dreams! Thomas and I get up but I’m slower than he is and he surprises me with coffee on my night stand <3


Leave house for my workout: Afterburn class. I have about 1/3 of my coffee before class but usually don’t have anything to eat. I greet my mug again on the ride home and am always so glad to have it!


Afterburn starts. This class is killer. I burn about 400 calories in 50 minutes according to my Apple Watch.


Back at home Birch is having breakfast. Thomas usually works until about 6:30 and then we tag team showering, breakfasts and getting Mazen on the bus. I take a speed shower and Birch terrorizes my room while I get dressed, pulling clothes out of drawers. I pick the room back up and we head back downstairs. He plays with his cups while I make breakfast.


We say goodbye to daddy who leaves for work. Birch didn’t eat much of his breakfast so he gets a second breakfast of yogurt and a little almond butter on a spoon (because he wants some of mine!)


I eat oats in a jar. Birchie and I play trucks for a bit while I have half a cup more coffee.


My babysitter arrives and I give B a big smooch before going upstairs to put on my makeup and brush my teeth (again).


I arrive at Grit Coffee and get decaf cappuccino and a cinnamon roll to take home for later. I put on my Mompreneur hat and work on my computer until 12, writing blog posts, working on a few site design tweaks, writing a newsletter, and voxing with some Beautycounter peeps. One reason I love going to 6am workouts is so I have a good chunk of uninterrupted focus time. It takes me a while to get in the zone and a while to come back out!


I’m back at home. Liz has just put Birch down for nap, so I have some lunch. I heat up a frozen meal from Splendid Spoon for lunch. They sent me some to test out. This is Cauliflower Tikka and is warming on a gray winter day. I love that the ingredient list is all real food.


I’m back to work trying to finish posts before nap ends! I never know if that will be 1:30 or 2:30.


Birchie is awake! He slept well today, which has not been the norm lately. I get him up and we wait for the school bus on his changing table.


Mazen arrives home!! Matt meets him at our house because Mazen is going there for the night. Mazen and Birch play tag for a bit.


Snacktime! Birch has a yogurt drink and I have a few bites of my cinnamon roll. Almonds would have been a better choice!


Birchie and I head outside for a stroller walk. It’s a sunny day!


Once we’re home again, we play for a bit until Thomas gets home.


YAY daddy is home!!!


I sneak out to a quick appointment at ACAC. I am getting some cryotherapy on my foot to see if it helps my chronic pain. The therapy is 5 minutes of freezing cold air blown onto your foot. It feels about the same as putting a bag of ice on (aka not pleasant). I don’t know how much good the cold is doing, but I think the warming massage that comes after is helping a lot. Thomas gives Birch dinner – a cheese quesadilla, a veggie pouch, and bits of Thomas’s dinner – while I’m gone.


Back at home I enjoy leftovers for dinner – sausage, asparagus, roasted veg, brown rice. I added some greek yogurt on top too. I talk to Thomas while he plays with Birch on the floor.


Thomas heads to a volleyball and then out to dinner with his buddies. B and I play trains until bath time.


Bath time!


Stories and night night. (Look at those post-bath curls!!)


I do the last of the tidying until I settle in with the latest episode of Survivor and get in bed to read at 8:30.


Night night!

(Thomas gets home at 9:30!)

The post A Day In The Life: Mompreneur appeared first on Kath Eats Real Food.

from Kath Eats Real Food