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Just realized my morning coffee routine was wrecking my sleep data
I went to a sleep tracking workshop at a local clinic in Portland last month. The guy running it asked about my caffeine intake and I said I drink my first cup around 6:30 AM. He pointed out that caffeine stays in your system for like 6-8 hours depending on your genetics. I checked my Oura ring logs and sure enough, my deep sleep was consistently low on days I had coffee after 10 AM. Switched to green tea before noon and my sleep score went up by 12 points in two weeks. Anyone else find a hidden habit that messed with their biofeedback numbers?
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gavin_kim1mo ago
Actually the half-life of caffeine is more like 4-6 hours for most people, but yeah it can still mess with deep sleep if you have it too late. Green tea is a solid swap though since it has way less caffeine and some L-theanine to smooth things out.
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smith.elliot1mo ago
Wow wait, 12 points in two weeks just from switching to green tea? That's wild. I've been blaming my mattress and my partner's snoring for years.
I had a similar thing with my evening screen time. Thought I was fine because I use blue light filters, but I ran a 30 day experiment turning off all screens an hour before bed. My HRV went up like 8 points on average and I stopped waking up at 3 AM every night.
Might have to try your green tea trick though. I've been stubborn about my morning coffee for too long.
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