What does the red color mean on the sleep graph?
In the graph that depicts light sleep, rem, and deep sleep, all the shading is in green, but I noticed a red part even lower than deep sleep. Any suggestions?
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I had this the other night. It means no data was collected at that time. For me, it was because my watch died, so everything after didn’t collect data.
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Wonderful! I thought I was having a near-death experience 
. Thank you
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