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How to fitbit NREM stages translate to standard NREM stages?

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‎10-24-2018 11:56

‎10-24-2018 11:56

Fitbit's "Sleep Stages" divides NREM into two categories, 'Light' and 'Deep'.  In the medical literature there are 4 NREM stages (designated Stage 1 ... Stage 4).

 

Does anyone know which stages 'Light' and 'Deep' correspond to?  I haven't found anything about this on the Fitbit website (or anywhere else).  I could make a guess, but if anyone knows, I'd like to hear about it.

 

thanks

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