RT by @levelsio: this worked shockingly well i've got a 1000+ streak on whoop. in the first mon

this worked shockingly well

i've got a 1000+ streak on whoop. in the first month i had it, i a/b tested sleep and i'd hit 100% all the time. i lost interest in the sleep % score after whoop changed the algo a year ago

now i index heavily on the sleep graph instead. keeping the line low and flat. meaning i know all the things that make the line not low and flat

when levels posted about this the first time, i realized we have one of the same humidity removing things in the master bathroom. i'd never interfaced with it before, because it's on a sensor. it just auto turns itself on and off

after reading what levels said, i investigated the switch. i discovered there's a way to make it go on and stay on

so last night i tried what levels did. i left it on all night. with the master bathroom door propped wide open

i didn't think it'd do much. for one, the fan thing is like, really pretty far from where the bed is. and also, the bathroom always feels kind of humid. seems like weak ventilation

and moreover, yesterday i'd had too much coffee. and too late in the day. meaning, at least for me, there was zero chance the sleep graph line would be low and flat

if the line was low and flat, it would suggest that

1/ CO2 was lowered, and also,

2/ CO2 being lowered had a pronounced enough effect to counteract a strong known negative predictor

this is not the lowest or the flattest line i've ever had. but conditional on this particular confounding variable, it's totally anomalous

remarkable. this is probably the second single biggest sleep impact i've found

let's see how it holds. i'm going to put our actual CO2 monitor in the room

<hr/>

@levelsio (@levelsio)

🌡️ Sucking the CO2 out of my bedroom turned out to be the final thing improving my already good sleep to great

My weekly sleep is now 1st in Los Angeles, 5th in California and Japan and 9th in Amsterdam, so really good

Most people have way too high CO2 in their bedroom (1500 to 2500 ppm) because that's what you breathe out and it doesn't get refreshed, I discovered this after getting an <a href="https://nitter.net/airthings" title="Airthings">@airthings</a> sensor (unaffiliated, I just like it)

There's a lot of confusion about CO2, you can't "air purify" CO2 out, it doesn't work like that, also it's not CO, it's CO2, it's what you breathe out, slowly a room will fill up with it and your brain and body will start struggling. You realize CO2 high when you feel a room is "stuffy", too many people breathing out, not enough fresh air coming in

If you sleep as a couple the CO2 will be double because you both breathe out for 8 hours. Americans who think HVAC will save them: no most HVAC recirculates air it does not refresh air (very new houses …

为什么值得关注

能改变理解方式，而不只是重复常识；符合当前抓取需求；它提供了新的理解或解释，而不只是表面观点

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