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Sleep o2 monitor

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Hi, recently my fitbit charge 3 had an update. 

I regularly keep an eye on my sleeping o2 levels as I'm asthmatic. 

What used to look fairly uneventful activity during the night has suddenly (Just the last few days) become very erratic with lots of high variations. 

Looking back historically to compare then to now did I discover that my older results have now changed to include lots of events during the night. 

 

Anxiety alert. 😱

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