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Physiological changes that occur during sleep phases. Abbreviations:... | Download Scientific Diagram
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Spectral power density of heart rate variability in different sleep... | Download Scientific Diagram
![Weird heart rate spike while sleeping. I don't normally wear my watch to bed. I usually charge it overnight. But I think I might start wearing it. Should I be concerned? : Weird heart rate spike while sleeping. I don't normally wear my watch to bed. I usually charge it overnight. But I think I might start wearing it. Should I be concerned? :](https://i.redd.it/afq0dbhgwhe11.jpg)
Weird heart rate spike while sleeping. I don't normally wear my watch to bed. I usually charge it overnight. But I think I might start wearing it. Should I be concerned? :
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