I do bi/tri phase sleep, 6 hours at night, and 1-2 naps a day (I work remotely so allows me to nap when I want) This is the best, sleep when you need to you body knows best.

Do you think our ancestors slept exactly 8 hours a night from 10pm to 6am? No they slept when they wanted.

> Do you think our ancestors slept exactly 8 hours a night from 10pm to 6am?

Yeah I pretty much do expect that (but more like 6 or 7). They were awake a few hours after sunset by fire light, then get up fairly early. I certainly don't imagine them napping during the day, when they could be working together to get food, unless it's a climate where it's too hot to do anything in the middle of the day.

Studies of modern hunter gatherers seem to back this up e.g. [1]

It's widely known that Victorians would have two sleeps over night, with a productive period in the middle, but this seems to be a misconception based on a passing remark in one court case. Even if true, this is a post-industrial society with unhealthily long working hours and I don't think we should be copying their sleep patterns.

[1] https://www.sciencedirect.com/science/article/pii/S096098221...

Nearly all predators spend large portions of their day sleeping, why would humans have been different?

Bears sleep about 7-8 hours/day, similar to humans.

Watch male lions they sleep when they want, laze about all day until they need to eat. Or you can be a deer caught in the corporate wage slave, alarm clock prisoner headlights.

Artificial light has a huge effect on drowsiness for me. This is quite noticable when I am out in the woods, camping in a tent. After sundown, I have about an hour left before I get so drowsy that I cannot keep my eyes open. Back home, indoors, I can stay awake almost indefinitely.

What about female lions?

Watch birds they fly when they want. Or you can be a slave worm bound to the earth. The choice is yours

If you watch birds you will see they don't use alarm clocks nor go to work, but still find food each day.

I've tried this but naps make me groggy for the rest of the day, or sometimes I get confused thinking it's the next day. What's your secret to waking up refreshed from a nap?

My PhD advisor likes to drink a coffee just prior to falling asleep. That way the caffiene slowly kicks in and wakes him up. I can't do this--I already have trouble sleeping and I feel the effects of coffee quickly.

But to answer your question-- for me, washing my face helps a lot. I don't know why. Not that I nap all that often.

I am groggy but I drink a Coke Zero and within 10-20 mins I feel great. Whereas without sleep I would be flagging.

There’s plenty of evidence that people used to sleep very early, and have a period of activity in the night, before having a second period of sleep.

I follow the same schedule as you do, and also work remotely, and usually take a single 1-2h nap somewhere between 12pm - 3pm. It makes me have two moments of “morning productivity”, which works very well for me.

In the end, listen to your body.