Apple Watch Ultra Heart Rate During Workout

I’ve been having problems with my Apple Watch ultra. basically as seen in the photos I’ve attached, every workout I do starts with the Apple Watch reading my heart rate and then for the next 5-10 minutes it doesn’t read at all. I’ve looked everywhere and read different forums and tried every setting possibility out there but none of it seems to work because it looks like I’m the only one with this problem, I’ve tried loosing and tightening my strap but it doesn’t effect the process. I’ve came to conclusion that this is a bug in the workout app because the heart rate sensors work and as seen they read my heart rate through the other half of my workout.


if anyone else has this problem please let me know.

Apple Watch Ultra, watchOS 9

Posted on Dec 18, 2022 1:35 PM

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Question marked as Best answer

Hi everybody,

I know all of you are frustrated about the Apple Watch not being able to read your heart rate sometimes while working out, well after about two weeks of talking everyday with Apple support we have a conclusion and it’s a scientific one.


Apple’s heart rate sensors are one of the most advanced sensors in the world for a wrist watch and they read your heart rate using the veins on your wrist.

when you begin a run you’re cold which means your veins aren’t popped out yet which makes it difficult for the every wrist workout watch to indicate what your heart rate is. When being in a lower temperature area such as running outdoors it’s likely that in the couple first minutes of the workout your heart rate won’t be read because your body is still cold therefor your veins didn’t pop yet (this happens mostly in the winter and depends on where you live) I’ve talked with friends who own Garmin’s and Suunto’s and they’re experiencing the same problem too because of cold weather.


Please be advised that every person is different then the other and some people take longer time to warm up either because they’re more in shape and running a couple minutes won’t warm them up or that’s just how your body is.


What I can advise you before you contact Apple about a problem like this is to make a run indoors where it’s hotter then your outside temperature and run on a treadmill and you’ll be able to see that the Watch reads your heart rate easily, just make sure it’s strapped on as Apple advised while working out.

Posted on Jan 10, 2023 8:03 AM

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231 replies

Sep 13, 2023 4:27 PM in response to bilaaa

I am considering that but I heard the ultra two has improved heart rate monitor. I this rumor? Or is it true ? It solves the problem I may reconsider. Anyone else have any news on that. Otherwise I’ll start shopping for a Garmin. Did find kind of a fix I started using a sweat band where you attach your watch and that has helped with the issue but evidently Apple don’t really care and are just interested in selling their new product instead of supporting the loyal customers.

Sep 19, 2023 6:03 AM in response to RAsgp

I’m guessing it’s just how the hardware interacts with you and a different watch won’t help. I also wear a garmin for the chest strap, as the optical sensor doesn’t work well with me. Same with the garmin one in fact. Maybe some body types just don’t work as well - I have tiny wrists, a hard to find pulse compared to others, and Caucasian. Maybe any/all those factors play a role - but I don’t think a hardware swap will help.


I was happy when optical HR came out years ago, but it’s never worked well for me regardless of garmin or Apple.

Sep 19, 2023 5:46 PM in response to OmriShpigel

I had this problem and eventually what solved it for me was to wear my watch on the inside of my arm, so the the screen is facing inwards instead of outwards.


Once I did this, the heart rate monitoring was constant and never broken. I think it’s because the skin on the inside of my arm is smoother, with less hair and less sun damage (thickening.)


Give it a try. I actually like wearing my watch on the inside now.


Hope this helps some of you.

Apple Watch Ultra Heart Rate During Workout

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