Question Mi band 4 minimal heart rate

[YMaty]

Has anyone of you got under 40BPM on your band? I would like to know what are the maximal and minimal bpm values. The maximal is probably around 200-215, but noone will ever surpass this (not mentioning that the band would probably measure it wrong), so we don´t have to be worried about it. But I am a bit worried about the lower border.

I am using Notify & fitness and in the sleep graph, I have steady 40bpm, but I have never got 39 or lower. Has anyone of you?

 

[jb2504]

Me too, never below 40 and never above 149.
With band 3 i got lower than 40 and above 149.

I checked again and did get once 31bpm
Only once in more than month, all other days are 40bpm min and thats for more than 15days.
Something isnt right i think.