T1D Sleep Challenge: Four Weeks In, What We've Learned
Four weeks ago, Neil asked you to do one thing: write down how many hours you slept. That was it. Just a number. And now here we are. This is the halftime checkpoint of the While You Were Sleeping Challenge. Neil does what any good coach...
The episode, word for word
Welcome to June.
I hope you had a good Memorial Day weekend. I hope you slept well. I hope your liver didn't stage a glucose production event at 4am while you were trying to rest.
Here's a thing about May: we talked about problems and mechanisms and research. We looked at the data.
June is different. June is where we actually do something about it.
And I want to start with something you're already doing every day. You're already doing this. You just haven't been doing it for this reason.
My name is Neil Greathouse, and this is Your Best T1D Year.
All right. Week 5 of the challenge. Welcome to the solution phase. This is where we start getting specific.
OK. Tonight, before you go to bed, what are you going to do?
If you're like most T1D people, you're going to check your blood sugar. Or glance at your CGM. Maybe dose for a snack you had. Maybe set a temp basal. Run through the usual pre-sleep routine. You already do this. This is not new behavior.
But here's the reframe I want to offer.
You've been treating your bedtime blood sugar check as a safety check. "Am I okay to go to sleep?" That's how we learn it. That's how most T1D education frames it.
I want you to start thinking about it as a sleep decision.
Here's why. Active insulin at midnight is not just a safety variable. It's a sleep variable. If you took a correction at 9pm and that insulin is still tailing off at 1am, and it will be, because insulin doesn't clock out when you do, that tail can create a drop at 2am. That drop might not be a low. It might not even fire an alarm. But it can create enough glucose variability to pull you out of deep sleep. To fire a partial arousal. To knock you back into light sleep right when your body was trying to go deep.
Think of it like this. Your correction dose from 9pm is like a character in a horror movie who you think is done at the end of act two. You've addressed it. You moved on. The scene is over. And then at 2am it shows up again and it's still doing stuff. Your active insulin is the post-credits scene. The movie you thought was over is not over.
So. What does this actually mean for you?
A more stable blood sugar heading into bed means fewer alarms overnight. Fewer alarms means better sleep architecture. Better sleep means better insulin sensitivity tomorrow morning. Better insulin sensitivity tomorrow morning means a more stable blood sugar. And on and on.
The loop we talked about two weeks ago. You can start it going in the right direction tonight. From the bedtime check.
The research on this is specific. Pre-sleep glucose in the range that's right for your body, and that range is something to confirm with your care team, not a number I'm going to give you, is associated with fewer nocturnal events, fewer alarms, and better overall sleep quality. It's not a guarantee. Nothing in T1D is a guarantee. But it stacks the odds.
One more thing. The check itself. Thirty minutes before bed, not right when you're about to close your eyes. Give yourself enough runway to make a small adjustment if one is needed, and for that adjustment to have started working before you're unconscious.
Not a full correction. Just awareness. Just: what's happening before I close my eyes?
That awareness is the intervention.
Tonight: check your blood sugar thirty minutes before bed. Not right before you sleep. Thirty minutes earlier.
Note the number. Note whether you have any active insulin on board. Don't do anything dramatic. Just know what's happening before your sleep window begins.
Do this for three nights. See what the morning looks like on the other side.
You've been doing a pre-sleep check for as long as you've had T1D. You've been doing it for safety. Now you're doing it for sleep. Same action, expanded purpose.
That's not a big ask. That's just a shift in how you're thinking about something you already do.
You're not doing a bad job. You're doing a difficult job, and you're adding tools to the kit. I'm proud of you.
Type 1 diabetes is relentless, but managing it doesn't have to be. New episodes drop 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.