Also pay close attention to the Garmin body battery. When I first got it was like I don’t need a device to tell me if I got a good night sleep, but I was wrong. The biggest thing is alcohol, drink around noon golden. Drink up to bed time going to be at zero when you wake up. Went on vacation and drank every day for a week was cruising at zero the whole time. Got back first night good sleep 100! Also staying up late and not drinking enough water will give the same results. Makes you think about drinking more when you got a big day ahead, although like I said can game the body by drinking from noon - 3 then rehydrating before bed. Cheers!