I work for Fitbit but am speaking only for myself. I'm guessing that this is the chain you're referring to since it echoes the "30 minutes after waking while l

I work for Fitbit but am speaking only for myself. I'm guessing that this is the chain you're referring to since it echoes the "30 minutes after waking while lying in bed" claim: https://community.fitbit.com/t5/Charge-HR/Resting-Heart-Rate-Inaccuracies/td-p/901287 https://community.fitbit.com/t5/Charge-HR/Resting-Heart-Rate... Other sources I checked did not echo that claim. As one commenter in the chain pointed out, RHR is not minimum HR. http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/GettheFactsAboutHighBloodPressure/All-About-Heart-Rate-Pulse_UCM_438850_Article.jsp#.W04ycdhKhE4 http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/G... https://www.mayoclinic.org/healthy-lifestyle/fitness/expert-answers/heart-rate/faq-20057979 https://www.mayoclinic.org/healthy-lifestyle/fitness/expert-... https://www.health.harvard.edu/blog/resting-heart-rate-can-reflect-current-future-health-201606179806 https://www.health.harvard.edu/blog/resting-heart-rate-can-r... Also, one of the critics in the chain thinks Fitbit must be inaccurate after his RHR rose from 68 to 71 after "hiking at altitudes up to 14,200 feet" then fell back to 68. I think this criticism stems from a misunderstanding about how altitude affects oxygen levels and how oxygen levels affect heart rate. All that being said, even if the devices are generally accurate, there are defects and they aren't designed as medical devices. To the extent you voluntarily share your data with a doctor or insurer (which is the only way they'd get your data), your doctor or insurer should treat it the same way they treat other useful but potentially inaccurate information.