I wear my Fenix 5 24/7.
Sleep tracking data is helpful but I have 2 suggestions to make it much better. One of these suggestions would be an easy tweak and the other would be much more involved from a development perspective. (Please see the attached screenshots).
Suggestion 1 - Easy Tweak - Please show Deep vs. Light vs. Awake as percentages as well as hours/min.
Why do we need this? Because knowing the percentage of your night spent in deep vs. light is a much more helpful gauge of the quality of your sleep than simply having the times. Garmin's competitors are doing this and it would not be difficult in terms of design or development.
Every morning I wake up and manually convert my sleep times into percentages.
Suggestion 2 - Please separate "Deep Sleep" into REM vs. Deep.
Again, Garmin's competitors are doing this. They are combining the Heart Rate data with the movement data from the Accelerometer to differentiate between REM sleep and Deep Sleep. Garmin is just using the accelerometer to measure sleep stages. Thus, since the body is equally still in Deep vs. REM sleep, Garmin is lumping them together as "Deep". I get that, but why not incorporate the Heart Rate? They have the hardware to be able to do this.
I love my Fenix 5 and use it for everything and that's not likely to change, but, i'm seriously considering getting a competitor's device to use at night on my other wrist for a more comprehensive sleep tracking overview.
Here are links to descriptions about some of Garmin's competitors' sleep tracking capabilities. I really hope Garmin prioritizes this in the near future.
http://thelocker.whoop.com/2017/05/01/understanding-the-stages-of-sleep-how-to-optimize-it-with-whoop/ ciq.forums.garmin.com/.../1236565.png ciq.forums.garmin.com/.../1236566.png ciq.forums.garmin.com/.../1236567.png