Dr. Michael Grandner

But it will overestimate wake time versus your self-report.

So if I asked you how much you slept and you said seven hours and your watch says six and a half, that's not a problem.

You're measuring two different things because the watch is probably picking up awakenings that you don't remember.

So were you physiologically awake during that time?

Probably.

Could it have picked up stuff erroneously?

Yeah, maybe.

Were you awake during that time?

Probably.

Does it matter?

Probably not.

Um, so, cause all of the guidelines and recommendations that people, you know, the seven hours of sleep guidelines.

I mean, I, I, I was on one of the, the, the panels, I was on the ASM and SRS, the CD, the panel funded by the CDC to develop time recommendations.

We were there in the room, we were arguing over this.

And those recommendations are not based on wearable data.

They're based on, on average, how much sleep do you feel like you get?

Because that is what's correlated with the health outcomes.

The wearable data is a lot more murky in terms of its correlation with the health outcomes.

It's different.

So if you're, if you're targeting a certain amount of sleep based on guidelines,