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Night awakenings correlated to HR- REM sleep + OSA or UARS.
Night awakenings correlated to HR- REM sleep + OSA or UARS.
I noticed all my night awakenings at 3:00 AM happen when I'm in REM sleep. The Apple Watch Series 8 is particularly good at measuring sleep stages compared to polysomnography-specialized devices, with around 90% accuracy in each of the four sleep stages compared to a polysomnography-specialized device. 

I have a theory about why I wake up during REM sleep. In REM sleep, our Heart rate usually goes up; this is normal, but since we are OSA or UARS sufferers, we also experience a decrease in oxygen levels at the same time as we are in the REM stage, which triggers the heart rate to go even higher, which leads to an awakening in the middle of the night.

I was thinking about which medications can reduce REM sleep and increase slow-wave sleep. Which is also a restorative sleep stage. In slow-wave sleep my HR stays very low, and is restorative as well as REM but without the HR increases.

Any insights? thanks in advance. 
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RE: Night awakenings correlated to HR- REM sleep + OSA or UARS.
_ hi, logart
_ interesting;
_ I am a mild OSA/UARS+ RLS sufferer, both conditions rather well managed these days.
_ still remaining some problems to go smooth through REM stages; not clear the reasons;
_ could you post some basic curves to compare (ex, TV, pressure, flow rate, RR, inspiration time )?
Good luck

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