HR wrist monitor goes crazy

1268832 27 days ago

Hi,

I am having issues with heart rate monitor in Garmin Forerunner 255s music. As you see on the scren - HR spikes unusally during low activities.

I am using this watch for 18 months constantly and since last 4-6 weeks it is going crazy. I cannot belive that during usual daily activity like walking i have zone 2 HR with almost 150 BMP.

I have 25.04 firmware that supposed to fix this issue for according to changelog, but it does not.

I cannot imagine having hr of 150 during simple walk. I dont face any of physiologial sings of this HR.

It does impact my workout analyses, my training prepartaions, and all stuff related to running.

I see two possibilites here:

- please prepare fix for the fix (lol)
- please let me know how do i downgrade my firmware to the last stable version - i think i cannot trust 25.XX updates anymore.

thanks

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0 ronand 27 days ago

It's become a bit of a joke. Every time they "fix" it they make it worse. I ran the Berlin Marathon on Sunday (fairly slowly in the heat) and the heart rate chart is laughable. It jumped into the 190s for a good section of the race before dropping back into the low 160s.

It totally messed up my maxhr and lactate threshold as my hr can only get up to around 176 now.

0 1268832 27 days ago

To all folks reading this thread:

Do you have old firmware (from june/july) that you can upload by any chance?
I dont follow their semantic versioning, but i believe it would be something before the major change - 24.XX

I have to say that i am highly dissapointed with this. I totally understand that wrist hr measurements might be innacurate. But this kind inaccuracy makes me think that i have heart problem. And this is exactly the opposite of garmin's mission - improving health.

If such simple statistic like HR is broken, how do i trust other features of this watch?

0 Hamy45!! 19 days ago

I agree, the 25.04 update completely wrecked my heart rate monitor. Walked a 16 minute plus mile yesterday and my heart rate kept dropping! Was as low as my resting HR at one point.

Garmin needs to fix this or explain how to get to previos firmware. I tried looking for it on my forerunner 255s music, no option according to online instructions. Anyone who has idea, that would be helpful.

0 1268832 19 days ago

Garmin Team - any update on this?

This bug affects one of the major features of your watch. It has been over 7 days when this thread is open and you did not bother to even answer to this thread.

0 RDW 19 days ago in reply to Hamy45!!

I use a HRM strap for exercise and its fine. The wrist has got worse though, especially it seems on relatively low HRs.

My typical 5k evening walk before bed id expect a HR of 100 - 120 depending on hill, terrain, speed. Since this update its often stuck at 60ish.
I can "fix" it by pausing the activity, going to "resume later", jumping up and down a bit to increase my rate and then resuming activity. Which isnt ideal.

I didnt get this behaviour on any previous version.

0 Hamy45!! 18 days ago in reply to 1268832

I just got a firmware update for 25.06. It doesn't specify what fixes are supposed to be. I tried heart rate monitor and that isn't accurate as well. Hopefully this update works

0 Garmin - SP 11 days ago

Please make sure to update your watch to SW 25.06 and follow the instructions and tips for improved HR in this article. https://internalsupport.garmin.com/en-US/?faq=xQwjQjzUew4BF1GYcusE59&searchQuery=heart%20rate%20accurate

0 8827044 11 days ago

Hi,

I have the same issue since the last update 25.06. It didn't fix hit. I have weird HR behavior wearing a chest strap or not.

0 8827044 11 days ago in reply to Garmin - SP

Has anyone tested this fix?

0 8827044 11 days ago in reply to Garmin - SP

I cannot access the link. Here's the error message I get: