My heart rate much like your is sporadic throughout the day. Admittedly is love to wear the Apple Watch over night to see how my heart rate changes at different times, perhaps even using it alongside a REM sleep app. How accurate is the heart rate monitor? I'm not hating on the watch quite yet, I'm debating ordering one now after tryin it on last night but so far seems like an elegant toy as oppose to a serious medical device. <Obviously it's not the latter but marketed more that way.