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Garmin 955 heart rate bug

If I do a run the heart rate is fine and feels accurate.

If I do a bike the heart rate is fine and feels accurate.

If I do a triathlon or multisport duathlon my heart rate is fine for the swim and bike, but for some reason the run is completely broken.

On the run it'll show 206bpm even though I'm doing conversational pace. I then take off my watch, wipe it down and wipe my wrist, 70bpm. Then the run stays 70-80bpm even though I'm breathing like 160bpm.

This is so so strange and only happens with a bike followed by a run. Why?

Top Replies

Former Member over 2 years ago +1

I made a similar post here.

There is definitely something buggy going on with the HR readings since 14.13 (for me) which makes me really sad, because I otherwise like this watch.

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0 5845754 over 2 years ago

Strava record showing the issue

0 Former Member over 2 years ago

I made a similar post here.

There is definitely something buggy going on with the HR readings since 14.13 (for me) which makes me really sad, because I otherwise like this watch.

0 5845754 over 2 years ago in reply to Former Member

yep thank you, that's exactly the same issue. For me my normal activities are fine though, but bike to run will be 100% broken every time

0 hassan987 over 2 years ago in reply to Former Member

Seems to be fixed with 15.11 can anyone confirm?

0 v0id over 2 years ago in reply to hassan987

For me its not...

0 ocular20 over 2 years ago

Is this with OHR or a paired chest strap?

0 v0id over 2 years ago in reply to ocular20

Wrist. On chest strap it's fine.

0 6340692 over 2 years ago

I have had almost the exact same experience. I see an implausibly high heart rate. Then I interrupt the heart rate sensor (I didn't take it off, but I used a gloved finger to wipe the heart rate sensor). After that wipe, the heart rate is implausibly low. After approximately 20 minutes, it does seem to gradually return to a plausible heart rate.

The main thread for the developers is here: https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-955-series/325155/what-is-going-on-with-the-hr-readings-since-14-13

The developers wanted to keep everything in that one thread because the discussion was splintering into multiple threads, making it unmanageable or impossible to track. I suggest that you post in that thread.