I know what my HR usually is for a run, it should be 160+ in some sections, yet for most of the run it's much lower, not even reaching 140.
I know what my HR usually is for a run, it should be 160+ in some sections, yet for most of the run it's much lower, not even reaching 140.
Same thing has happened to me, No tattoos or sweat issues, max HR which should be nearly 170 in races now shows up in the 140's. It has worked fine since purchase but started giving low readings on a Nov 23rd race, then worked fine on a race a week later, but by December it failed to register proper heart rate data routinely