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Prof. Matthew Walker says the accuracy of sleep trackers when it comes to per stage time is questionable. See Peter Attia podcasts w/ Walker. Have you thought

Prof. Matthew Walker says the accuracy of sleep trackers when it comes to per stage time is questionable. See Peter Attia podcasts w/ Walker. Have you thought about going to a sleep lab to get some higher quality data? It’s near impossible to diagnose someone over the Internet, especially when the subject matter is so complex.

newsbinator 7y ago
That's good to hear! My sleep tracker seems to base results on heart rate, and maybe my heart rate doesn't dip enough during sleep to register? I'd like to do a sleep study, but it's over $1,000 out of pocket, so not a small investment.
- hhanesand 7y ago
  That seems plausible to me. I don’t know if HR is a good enough signal, since it varies so much between person to person. Didn’t know they were that pricy, ouch.
- DenisM 7y ago
  It will be worth it. No price is too high for a lifetime of good sleep.
throwaway9d0291 7y ago
I think the problem is that most sleep trackers try to judge sleep based on heart-rate, which I don't think is valid. There are a few sleep headbands that use an EEG though and in my experience they've been reliable (e.g. mine correctly judges when I actually fall asleep and has correctly judged that I was in REM sleep when I woke up from a dream).