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Vivoactive 3 bad (low and inaccurate) heart rate in last 20 days

It worked generally fine before (it was used actively for running, swimming and cardio for year and a half), but in last 20 days or so it does not measure heart rate correctly:

When sitting (resting ) heart rate is around 80 and it was always around 70, even less. No way it is 80.
During workout, it shows much less accurate measurements, snd it is very low in the first part of the workout, after some time it picks proper heart rste.

Does anyone have these issues or know how to resolve them?

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0 takearisk over 4 years ago

i came here for same issue. During the activity, heart rate is so inaccurate. i thought it was about my chest heart rate sensor but it didnt like this before. heart rate measurement is so low mostly. i think it started with 7.50 version. i dunno. it has to be solved.

0 julmass over 4 years ago

I tried something weird today that worked. I have always used Cardio for general workouts with disappointing results. I used "indoor cycling" because I was doing an indoor cycling session, and it worked perfectly. So maybe it is a problem with the activity type. I will use the same activity type for all indoor workouts from now on.

0 takearisk over 4 years ago

sounds weird but i have also same problem for indoor cycling.

0 Vizi over 4 years ago in reply to julmass

Thanks for info.

In that case, there is clearly a bug in Cardio mode, probably introduced in latest update, and Garmin should fix it.

0 Vizi over 4 years ago

Update: I performed factory reset and situation is the same - heart rate during workout is measured as much lower than it actually is.

I believe that problem is due to latest software update. I ask Garmim to fix the issue.

0 nhlfan79 over 4 years ago in reply to Vizi

Same for me. I did a 5.5 mile power walk this afternoon at a brisk 12:30 pace, yet barely cracked 102 BPM at any point. It used to be 160-170 BPM before whatever broke this watch.

0 Vizi over 4 years ago

Anyone from Garmin ro respond on this issue that makes the watch useless for fitness?

+1 Vizi over 4 years ago

Factory reset seems to have fixed the problem.

0 julmass over 4 years ago in reply to Vizi

I did the same, lost my settings but now the HR works adequately.

0 3922977 over 4 years ago in reply to Vizi

Hi Vizi, just wondering if Garmin has responded to your query. I have the same issue. I just completed a 5 km walk and the heart rate was as low as 62bpm the whole time (below my resting heart rate) and then in the last 500 meters of the walk the heart rate suddenly started to become more accurate. So frustrating. and Garmin do not make it easy to contact them. thanks