IMHO you are better off monitoring your resting heart rate trends - the heart rate sensor in the Fenix 5 Plus is VERY good for measuring resting heart rate, and is within 1 BPM of both my Wahoo Tickr and Polar H10 heart rate belts. I got a Fenix 6 a couple weeks ago to replace a Lily that I was having some common issues with. I loved the app enough though that I wanted another garmin and settled on a 6 sapphire. I'm kind of frustrated with the step counts though. The design of the Fenix 5S Plus Sapphire has been changed a bit, making the watch incredibly elegant and nice looking. The screen has been upgraded, so that you now get the same size as the Fenix 5 Plus and Fenix 5X Plus. The new screen is 1,2” tall and has 240 x 240 pixels, compared to the Fenix 5S that has a screen of 1,1” and 218 x 218 A Fenix 5x already has stress (All Day Stress & Recovery from FirstBeat), and the same factors that show the stress score are what shows the body battery drain when not active. In other words, if stress is high, body battery will go down even though you're still. If you're active, body battery will go down based on how active you are and how rW66LRy.

garmin fenix 5s plus body battery