Dr. Matt Walker

And it seems to be in our research a pretty good proxy for health and wellness too.

The final aspect of the QQRT, quantity, quality, regularity, comes on to timing.

How is timing different to regularity?

Because regularity is about getting your sleep at the same correct time.

What I mean by timing is your chronotype.

So people may have heard of this phrase, are you a morning type, evening type, or somewhere in between?

That, it turns out, is, and it's about a third-third split across the population, maybe a little bit different.

Yeah.

Yeah, so once you are an adult, because that pattern of your timing of sleep does change during development very much so, despite, you know, we can all remember being kids and wanting to stay up with the grownups.

And all of a sudden, the last thing we remember was, you know, 7 o'clock comes around, 8 o'clock comes around, and you think, great, I'm going to stay up until 10 or 11 with them.

And then you wake up the next morning because you were carried to bed because it was lights out.

So setting that aside, once you're an adult and you have your stable rhythm in place, there is variability.

Now, in sleep science, we break it down not into three categories, but five.

Extreme morning type, morning type, and neutral.

Evening type, extreme evening type.

Could you repeat those again?

So extreme morning.

Extreme morning type.

So what qualifies as extreme morning type?

So an extreme morning type would be someone who would like to say go to bed around 8 p.m.