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Re:Sleep is essential – researchers are trying to work out why by lizknope on Thursday April 10, 2025 @10:22AM (#43644080)
I haven't used an alarm clock in 20 years and wake up within the same 5-10 minute window almost every day.

I have a friend that will just sleep through multiple alarms. But he can also just fall asleep in 10 minutes on an airplane and I can't sleep at all on a plane. He also takes lots of naps and I never take a nap unless I'm sick.

The worst feeling to me is waking up from some external noise. I just feel so groggy afterword. My body will feel better after 5 hours of sleep and I just wake up naturally compared to 5 hours, go back to sleep for 2 hours, and get woken up during the wrong time (middle of REM cycle?) and then I feel tired for the whole day even though I got more sleep.

Re:Sleep is essential – researchers are trying to work out why by david-gpu on Thursday April 10, 2025 @11:14AM (#43644674)
Your friend could benefit from a sleep study. I'm not saying they have sleep apnea or UARS, but people with those disorders often have those symptoms.
Re:Sleep is essential – researchers are trying to work out why by morkalork on Thursday April 10, 2025 @10:42AM (#43644290)
Wasn't there supposed to be a smart watch out there you could set a window of time you wanted to wake up like "between 6:30 and 7:00" where it would use the sleep tracking to pick the optimal time to wake you up like at the end of a REM cycle? I feel like I must have hallucinated this because I'm wearing a smart watch (fitbit) now and no such feature exists.
Re:Sleep is essential – researchers are trying to work out why by coderc on Thursday April 10, 2025 @11:03AM (#43644549)
I'm wearing a fitbit (charge 6) now, and I still have this feature. It's called "Smart wake" https://gadgetsandwearables.com/2021/07/09/fitbit-smart-wake...
Re:Sleep is essential – researchers are trying to work out why by morkalork on Thursday April 10, 2025 @01:11PM (#43646010)
A-ha that answers my question

>while the new Inspire 2 gives insights into sleep stages, the Smart Wake feature is absent. We’re not sure why this is. Hopefully it will come via a software update.

Re:Sleep is essential – researchers are trying to work out why by esperent on Thursday April 10, 2025 @10:55AM (#43644440)
It's an app that uses data from your watch, the name is something like sleep cycle.
Re:Sleep is essential – researchers are trying to work out why by rorytbyrne on Thursday April 10, 2025 @10:59AM (#43644497)
Apple Watch does this.
Re:Sleep is essential – researchers are trying to work out why by formerly_proven on Thursday April 10, 2025 @11:07AM (#43644592)
Not ootb-separate app needed?
Re:Sleep is essential – researchers are trying to work out why by Izkata on Thursday April 10, 2025 @06:31PM (#43648639)
There's an Android app called "Sleep" that does this without the watch. You put your phone on the corner of your bed and it figures out how awake you are with the accelerometer.

Quick edit, I guess the name changed slightly: https://play.google.com/store/apps/details?id=com.urbandroid...