I have a fitbit3 and am mostly very happy with it. I have a low resting heart rate of around 42. I notice that when my pulse falls below 40 sometimes the Fitbit says it’s twice as fast as it actually is - so a real 38 pulse (old fashioned measurement, or using a blood pressure monitor) will sometimes be recorded by Fitbit as 76. Other times it gets it right. Is there a Fitbit which records low pulses more accurately than mine?
