Since getting this CO2 meter, I’ve found there’s a high correlation with being unfocused and/or irritable with 800+ readings. Reminder to get some fresh air, open the window, etc.

Have this our bedroom and noticed CO2 impact sleep 

Removing caffeine improved whoop recovery by 5-8%

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latest would still be before noon. whoop is obviously not a scientific measurement and I don't mean to suggest the data would look similar for everyone. however, did make a difference in my case 

if placebo allows me to sleep better, i'm fine with that :)

How late in the day did you consume caffeine? I am a one cup 8a person… nothing after