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Is there any limit on minimal hr recorded?

I have 245 for a two days and the device does not show HR below 40 on graphs. However, my previous device (not a garmin) and even Garmin Connect App can show me values below 40 (when I woke up for example), but not on graphs... So why?

0 dom over 4 years ago

I previously owned a 735 and a 645 and my impression is that the 245 reads higher. I saw instantaneous values of 30 but never lower with the 735. The lowest I have seen with the 245 is 36 but the daily low is always higher because it needs to sustain the value for at least a minute.