Comments on: How to fix Apple Watch heart rate monitor not working Unconferences, peer conferences, participant-driven events, and facilitation Thu, 07 Oct 2021 08:40:52 +0000 hourly 1 By: Ashish Thu, 07 Oct 2021 08:40:52 +0000 Excellent article, Adrian.. and I’m reading this exactly 2 years from the date of publishing. (Happy Birthday?)
I have a series 3 and was beginning to give up on it since I faced the same issues in the last 3-4 months. This was both on treadmill and outdoor runs. Since this is an older model, I don’t have enough memory and refrain from upgrades. But let me try that first and then revisit the post. Surely, something will work!

By: Adrian Segar Sun, 05 Sep 2021 18:59:03 +0000 In reply to Roger Young.

Hi Roger,

Your experience mirrors mine. It’s so frustrating.

In June I posted a comment about my experience that my watch began to record my heart rate reliably right after I upgraded it to watchOS 7.5. However, this did not last long. But the same temporary improvement occurred when I updated it to watchOS 7.6.

For both these upgrades I had to do the entire backup -> reinstall OS -> restore from backup process, since my Series 3 watch didn’t have enough memory to do the upgrade “in place”.

So my current theory is that there’s some kind of memory management issue on these watches that is temporarily cleared when the watch is reset with a fresh copy of the OS.

However, I don’t want to reinstall watchOS every couple of weeks, so the problem remains.

By: Roger Young Sun, 05 Sep 2021 13:15:26 +0000 Bought my Apple Watch 6 in April 2021 and have just discovered that the heart beat monitor skips periods of 5 minutes during cycling workouts. Always when I have upped my work rate significantly. (Eg when attacking a hill).
Very annoying, as it is just these sections of the workout I need to analyse!

By: Carol Sun, 18 Jul 2021 13:25:16 +0000 In reply to Mike.

This is very interesting, and also correlates with arm movement for me. I have had a series 5 for a little over a year. I first saw the problem while walking on a treadmill and now see it a lot while doing apple fitness + rowing workouts. Scrolling back through my workouts, I do not see the problem with cycling, yoga, core, etc workouts.

I have tried reversing the watch so the sensors are on the inside of my wrist, cleaned the sensors, and sometimes have the watch band so tight it’s painful. I have contacted apple support. I hope this can be resolved, it’s frustrating.

By: T Fri, 09 Jul 2021 01:14:34 +0000 I also have this issue I started my walk app but even before I started walking it said it was 150bpm which is was not I would have felt that just standing around … also it only lasted there for 5 seconds then dropped to 85 bmp obviously not right I have also called Apple have had tickets with no resolution when I wore my Fitbit I had less problems but the Apple Watch is expensive so I would think they would want to help seems like a lot of ppl have the same problem

By: Andy Mon, 05 Jul 2021 09:40:36 +0000 In reply to Adrian Segar.

I’m having the exact same issue on my series 6. It always records the first minute or 2 of my run then skips around 6 minutes then continues to record the rest of the run. The result is that my HR looks like it jumps from 60 to 160 after the first KM. I’ve just had a replacement sent and the exact same thing is happening so I’m leaning towards something software related.

By: Adrian Segar Thu, 10 Jun 2021 23:43:27 +0000 In reply to Amanda.

Hi Amanda,
This is a commonly reported issue. According to Apple, “the Activity app aims to identify activity that equals or exceeds the intensity of a brisk walk. This requirement applies both during general daily wear and when recording workouts via the Workout app”.

So you may not be walking “briskly” enough for the watch to count your walk as exercise.

It’s also possible that you need to edit your personal health information.

For more information on both these issues, check

By: Joe Thu, 10 Jun 2021 23:32:10 +0000 I have an Apple watch 6 with same issue for 8 months. Today was the first time it read correctly my heart rate for a whole run. What I did was:
1. shaved my wrist where the sensor touches my skin. (I’m part wookie)
2. wore long sleeves over the watch. run temp was 48 F
3. Wore the watch as close to my hand as possible….NOT back towards my elbow
4. less arm movement when running.
5. I disabled the auto-pause.
Not sure if it was one or a combination, but it worked. Thanks for all above

By: Amanda Thu, 10 Jun 2021 20:12:19 +0000 In reply to Annoyedwithothers.

My heart rate is 50 at rest so when I go walking my pulse doesn’t really get high so my watch doesn’t always detect that I’ve done a walk or any exercise is there anything I can do??

By: Adrian Segar Mon, 07 Jun 2021 20:09:19 +0000 This may be a premature announcement, but since updating to watchOS 7.5, I have not had a problem with my Series 3 Watch recording heart rate reliably for the last ten days I’ve been running. Please share if this OS upgrade did or didn’t solve the problem for you!