How to Use Your Overnight CGM Data to Improve Sleep and Blood Sugar
You've been sleeping next to one of the most detailed health monitoring devices that exists. Every single night. For however many years you've had your CGM. It has been logging everything, every rise, every drop, every 3am event, every...
The episode, word for word
I want to take a stand today on something that I don't think gets said enough in health content of any kind.
Perfect is not the goal.
It is specifically not the goal for T1D sleep. If you have been measuring your sleep quality against the general population standard, the eight hours, the ninety-percent-efficiency, the deeply-restful-uninterrupted benchmark, I am here to tell you, with genuine care, that you have been holding yourself to the wrong ruler.
T1D "good enough" is its own category. And it deserves its own definition.
My name is Neil Greathouse, and this is Your Best T1D Year.
All right. Let's talk about realistic expectations for T1D sleep.
First, the context. You're managing a disease overnight. This is not a passive thing. Your body is doing metabolic work while you sleep that other people's bodies handle automatically. Your liver is running shifts. Your cortisol is cycling. Your CGM is monitoring. Your insulin is tailing. Some nights, things are going to happen that interrupt your sleep. That is not failure. That is T1D.
The chronic illness sleep research is consistent on this: comparing sleep quality in people with T1D to population benchmarks designed for people without chronic illness is not a useful exercise. Of course it's going to look different. You're managing different equipment.
Here's what I'm NOT saying. I'm not saying: give up on trying to sleep better. If I believed that, I wouldn't have run an eight-week challenge about it. I believe you can meaningfully improve your sleep. We've been building toward that this whole challenge.
What I am saying is: "meaningfully better" and "perfect" are two different destinations. And chasing perfect while managing T1D is a fast road to frustration.
Here's what good-enough T1D sleep might actually look like.
Fewer alarm wake-ups than you had three months ago. Not zero. Fewer.
A morning blood sugar that's more predictable more often. Not always. More often.
Waking up and feeling like the sleep did something, even if it wasn't perfect. Even if the CGM alarmed twice. Even if you checked at 3am and went back to sleep. You feel like it helped.
That is winning. I mean that.
One thing I want to say to the T1D perfectionists in the room, and I know you're there, because I am you, the standard that serves you is the one that acknowledges what you're working with. A batting average of.300 in Major League Baseball makes you an elite hitter. Nobody says "but why not.400?" You play the game with the physics of the game.
You play the sleep game with the physics of T1D. And T1D physics include alarms and lows and the dawn phenomenon and cortisol and Fear of Hypoglycemia and all of it. Your benchmark needs to be calibrated accordingly.
Better than last week is winning. Fewer interruptions than last month is winning. Waking up less exhausted than you did in April is winning.
Define your version of winning and measure against that.
Write one sentence. What would "better" sleep look like for you? Not perfect. Just better.
One sentence. Your version. Not the sleep tracker's version. Not the general population's version.
Yours.
I want to say something to the person who's been frustrated with their sleep numbers. Who's looked at their overnight graph and felt like it wasn't good enough.
You're managing a disease that literally changes how sleep works in your body. The expectation cannot be the same as for people without that disease.
Meaningfully better is the goal. And you're moving toward it. I can see you moving toward it.
You're not doing a bad job. You're doing a difficult job. And your "good enough" is a lot harder than most people's "perfect." I'm proud of you.
Type 1 diabetes is relentless, but managing it doesn't have to be. New episodes every Monday, Wednesday, and Friday. You're not doing a bad job, you're doing a difficult job. Nobody remembers easy.
This is the script as read on the mic, lightly tidied for reading. Education, not medical advice. Talk to your care team before you change anything about your insulin.