I did work for the Sleep Lab at my hospital. There they used EEG in addition to basic ECG, blood ox and BP. I believe Apple uses a combination of heart rate, blood oxygenation and movement to detect sleep apnea. This method may indicate apnea but it would take a full sleep study to definitively diagnose it.
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Apple Executives Discuss Apple Watch's Life-Saving Health Features in New Interview
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I'm just one data point. I wear my Series 10 watch about 23.5 hours a day. I charge it while I'm getting ready in the morning. But I usually have 20% or so when I wake up. I'd love to get the kind of battery life I get on my Casio plastic watch (about 20 years and running) but they're different animals.
Given their expertise in battery optimization, I'm guessing Apple can achieve a week of battery life, but simply choose not to.
It's almost as if they've taken a philosophical stance that charging an AW every 18 hours is not a big deal. And if you're running low, the new fast charging will give you another 8 hours. And if you really need longer battery life, get an Ultra.
Except when comparing a Garmin to an Apple Watch you are looking at two rather similar animals.
But you are only guessing. While I have not used the Garmin I suspect there is a lot more going on in the AW. But Apple's model works for me.
When both watches use AMOLED displays, have GPS, music, optical heart rate sensors, they are not different animals. Same species.
Your Casio from 20 years ago is a different animal.
why before sleep? Why not after you wake up? While taking a shower? During lunch break? While sitting in front of your computer? There are many many alternatives…
According to Apple, they use the accelerometer for their sleep apnea detection, they cannot use blood oxygen as that is disabled for any AW after Jan 24.
There’s a paper they published how they do it…
It's only in the US that it's been disabled, this sensor is 100% working fine and enabled as is the blood oxygen app on every new Apple Watch. I'm in the UK with a new black Ultra 2 and it works fine.
Every new watch has the hardware it's just been switched off at least for now in the US.
Very often, during sleep apnea, the person will jerk awake after not breathing. I assume the watch will detect that. I think Apple will get the O2 sorted out. I got my version 10 just before the decision.
this is the document I was referring to:
yes, SpO2 is only disabled in the US, however, my point was that sleep apnea uses the accelerometer, not blood oxygen, see this:
Interesting article. Thanks. I'm surprised that they rely only on movement but they seem to have found a correlation with just body movement. But this is just an indicator of apnea. It would take a full test for a diagnosis.
BTW, the link you uploaded is broken. I had to cut and paste the text.
