02-21-2018 06:25
02-21-2018 06:25
Occasionally I'll sleep a solid 6-7 hours... Get up, look at my fitbit sleep stages, and then fall back asleep for another hour or two.
Sometimes after my 'first sleep' (6-7 hours - most of the night), my fitbit shows specific sleep stages. Say, 'deep sleep' from 10:45pm - 11:15pm... Or what have you. But when I check it later after my second shorter sleep, it COMPLETELY changed into a different pattern.
Why is this the case? Why should a later sleep completely negate earlier calculations? It just makes me question the accuracy of the sleep tracker...
02-23-2018 15:36
02-23-2018 15:36
You're right; it does not make any sense that it should radically change sleep estimates from several hours earlier. I too question the legitimacy of this sometimes.
For instance, last night it says I had a 32 minute block of time with straight deep sleep. Then, immediately following that it says I was awake for 11 minutes, which I don't see any way how that can be right. Awakening from deep sleep produces more sleep inertia than any other sleep stage, as it's the hardest one to awaken from. I know when I've been awakened (or more appropriately startled) out of this stage, as it is known to cause a lot of disorientation. I did not experience that last night (although at some point I did wake up abruptly out of a vivid dream, but that would have been from the REM stage).