I recently stopped smoking and can see on my Fitbit that my resting heart rate has gone from around 65 to around 59. I am just watching TV at the moment, and could see it was 55bpm when I glanced at my wrist there. Slightly freaked out! I am not sure how accurate Fitbit is - is this cause for concern?
I am normal BMI, 40s, and in my fourth week smoke-free.