This is a suggestion to add things like time taken to fall asleep, time in REM, sleep efficiency as a percentage, and other values that Fitbit now supports.
The sleep we get (or don’t get) and the quality of it (REM sleep that produces growth harmones needed for body building, deep sleep when the body does a near shutdown, etc.) all totally affect our overall health. Besides, I love to see that Fitbit sleep data over time and stored permanently…
Totally agree with the proposal, the breakdown is what would really help on the correlations. Correlating with time asleep does not depict the actual state I am, as I could be in bed longer but actually have low effectives (low REM, low deep sleep stages).
Fitbit now provides a “sleep score” that is a simple number out of 100 - very useful for this purpose.