Phil:

This is fascinating data.
I have been using a Mi Fit for the past four years to track my sleep. (It also tracks the number of steps I take but I don't care so much about that). The information the MiFit provides is useful but doesn't appear to be as detailed as the app that you are using.

The single most important thing that I have discovered is that by going to bed early (something that is against my nature) I always get a better night's sleep. If I retire around 10:00 pm I awake well-rested around 5:30 AM. If I go to bed later, I wake up around 6:00 AM and am tired.

I often have difficulty getting to sleep because I can't shut my brain off. I deal with this by taking a sleep aid (Zolpidem AKA Ambien). However, I am loathe to continue taking a drug in order to get to sleep because of the danger of dependance.

Please keep me updated on any discoveries you make regarding enhancing your sleep. I would love to hear about them.

All the best,

Jerry H.