translated for normal humans:

someone wore an apple watch, fitbit, oura ring and whoop for one night next to a real lab sleep study, then lined up the charts.

N of 1 just means the experiment is one person (here, themselves), so its a snapshot, not proof.

works because: the lab reads your brain waves directly. the wearables guess sleep stages from heart rate and movement, so they disagree with the lab and with each other.

worth remembering before you trust last nights deep-sleep score. for anything that actually worries you, talk to a doctor.

The N-of-1 design is the honest way to read these. For sleep specifically, all four infer stages from movement and heart-rate proxies rather than EEG, so they capture total sleep and timing well but tend to overcall deep sleep against polysomnography. Where they earn their keep is intra-individual trend — your own week-to-week drift — not absolute staging. Did any track HRV tightly enough to be clinically useful?

@EricTopol @nicnguyen @ouraring @whoo Wearables are overrated. At least for my generation. At 79 never used or needed them. Just keep hiking and running like I have since 1978.

@EricTopol @nicnguyen @ouraring @whoo @grok can you summarize the article?

@EricTopol @nicnguyen @ouraring @whoo @grok can you summarize the article?

@GarySmithInKY @EricTopol @nicnguyen @ouraring @whoo Many longevity enthusiasts and medical professionals, including Eric Topol, emphasize that sleep and exercise are the two biggest drivers of healthy aging. Perhaps a sleep-tracking device can help us optimize one of them and stay healthier longer.

@EricTopol @nicnguyen @ouraring @whoo So seems like Apple Watch is the best choice for this with the Fit from Google following in second.

@EricTopol @nicnguyen @ouraring @whoo Good article. Wear Whoop and Apply watch. Would drop down to apple watch only, if they solved the shirt battery life issue. If I wear it while I sleep, when will I charge it? Whoop solved that with the wireless battery pack.

@EricTopol @nicnguyen @ouraring @whoo https://youtu.be/oMVJP5WLxC4?si=vnwJbeZH93c0-Jbo

@EricTopol @nicnguyen @ouraring @whoo Appears Apple Watch was most accurate, with only one 30-minute block different from the sleep study

@EricTopol @ouraring @whoo Thank you for sharing!

@EricTopol @nicnguyen @ouraring @whoo Does the wearing location of a device matter at all? I’d assume it does to some extent. Maybe a follow-up study could use an Apple Watch on each wrist and then swap the watches between wrists to control for any watch effect.

@EricTopol @nicnguyen @ouraring @whoo Any that require a subscription can forget it! Once I’ve paid for it, am not going to keep paying, that’s such a trap!

@EricTopol @nicnguyen @ouraring @whoo I would like to see the sleep pattern when taking orexin antagonists

@EricTopol @nicnguyen @ouraring @whoo $HIMS next

@EricTopol @nicnguyen @ouraring @whoo I'm rotating out of the Whoop just because the Google Health subscription is included in the Google Drive plan I was already paying for

@EricTopol @nicnguyen @ouraring @whoo aka: they are trashy pseudoscience and generally are worthless?

Its a good article. My fitbit software has recently upgraded to Google Health and has got better at tracking sleep even though I am not a massive fan of the UI. The AI is interesting in that it is frequently asking me to do less exercise. I think it does not recognise that although I am chronogically 66 my phenotype is a lot younger. It is also interesting that it will respond sensibly to arguing about the sleep tracking and fix it. Because I am a binge drinker it can get the sleep tracking wrong. Anyway off to the pub.

@GarySmithInKY @EricTopol @nicnguyen @ouraring @whoo I am sure these devices would say my sleep pattern is horribly bad.

@tblairm @EricTopol @nicnguyen @ouraring @whoo Ask Grok is currently available to Premium and Premium+ subscribers only. Subscribe to unlock this feature: https://x.com/i/premium_sign_up?referring_page=grok-post-2063633131358359620