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 Top-ranking reply

Posted on Jan 10, 2023 8:03 AM

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.

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274 replies

May 2, 2023 11:39 PM in response to DazSpruce

Does anyone know whether the watch8 has the same issues or not? I am seriously considering selling the ultra. I had a watch4 for 3 years and never had any issue. It is annoying and ridiculous that a $1,000 watch can’t even read the heart rate reliably. I am even considering buying a different brand, but I am using Siri every day and could probably not do without.

May 4, 2023 12:46 AM in response to Mediarite

I have tried all the different suggestions from tight ing it up to moving it up the wrist, etc... nothing seems to work. As far as I am concerned (and it appears I'm not the only one!) it is a total rip off. The watch is marketed as a radical sports watch, but has a critical fault! Im back to my Garmin.

It also frustrates me, that all the you tuber "reviewers/influencers" none, has spotted it. It is because they are under $$$ from Apple?

May 4, 2023 8:16 AM in response to Tocavi

Totally agree. My series 4 had issues after I took it into a pool. No more than 3 feet deep and less than 30 minutes. Apple was denying the warranty claim because warranty doesn't cover water damage. Absolutely ridiculous considering there are swim workouts and even pictures of people doing underwater aerobics on apple's website. I waited a week and called in again, but reported it as a battery problem.

May 5, 2023 11:54 PM in response to aNonNuhMus

I think the best strategy is to continue reporting the problems and maybe posting data. That will give the bigger chance that apple might solve it. We can of course all find our individual solutions to solve our problems and that is also ok. I put a lot of my money into the ultra and for me it's not economically viable or environmentally responsible to have more than one device. So, I'll stay positive and stick to the hope that apple find a way to make their software work with the huge number of different people out there, all with different sports, habits and physiologies.

May 9, 2023 8:33 AM in response to OmriShpigel

This doesn't make any sense.

I've been using Garmin for >10yrs in all my running events and independently of being hot, cold, rainy, foggy, indoor...., I've never experienced such a thing related to HR measurements.


Apple needs to acknowledge the problem and fix it to make this watch as a credible alternative to Garmin, Suunto,... I hope it's SW related, otherwise it's really a severe topic for all of us that spent big money in the device.

May 20, 2023 5:05 AM in response to Mickja8

After updating to os 9.5.. had a run again wearing both Garmin 7x Saphire Solar and Ultra! Although heart rate reading was steady on Ultra (wearing a ocean watchband) there was a HUGE difference between Garmin and Ultra in terms of heart rate reading! So I shall probably use Ultra just for casual ocassions but not for sport! Totally lost my trust in Ultra as a sport watch and I consider Apple advertisment on it as absolutely misleading! Absolutely gutted…

May 30, 2023 2:42 AM in response to T2NTCN

T2NTCN wrote:
My only hope was waiting for watchOS10, but i do not want to wait until October.

The only thing that really makes me struggle to get rid of my Ultra is the „integration“ in the Apple ecosystem.


Same for me, however I could do without. I tried running with the Fenix, and the only thing I missed is the Cellular service when running through forests.


Rumors have it that Epix/Fenix will have cell service in the next model to be announced next month. If that's true, that's probably the point in time for me to jump off the Apple Watch wagon.

Jun 1, 2023 12:40 AM in response to helpx

Sorry, little off-topic and may sound like an ad for Garmin (it is not supposed to be).

So, i finally ordered a Fenix7 which arrived yesterday. Boy, thats a completely different league in terms of training metrics. You have any data you can think of, stamina gauges, race time predictions, breathing rate, body temperature and whatnot. I am not a scientist and have to figure out what it all means, but the apple watch software feels so rudimentary compared to that. There are freely adjustable workout screens, custom watch faces etc. - unbelievable.

The only drawback in my point of view is the LCD display - it has a great visibility in direct sunlight and outdoors, but its really not very well readable indoors.

In any case, Apple got some serious homework to do in terms of software and training data and not only for running.

Jul 22, 2023 8:29 PM in response to bum_trip

I've tried everything. Running with the phone, various tightening of the strap, reset with a restore from backup and nothing helped. I have to run with a chest strap to be ok. Half a year saving up for an expensive watch that then doesn't work as it should. I'm really disappointed.


Translated with DeepL (https://www.deepl.com/app/?utm_source=ios&utm_medium=app&utm_campaign=share-translation

Aug 23, 2023 7:40 PM in response to OmriShpigel

I am having this same problem six months later. The watch just won’t read my heart rate. In a 10 mins relaxed run in mellow or hot weather, it will read only once at 160bpm at some point, and stay grayed out for the whole rest of the time. No idea what zone I was in either. I spent so much, and other Apple Watches never had this issue


edit: also, I’m in latest iOS and watchOS. This is quite unacceptable

Sep 4, 2023 7:24 AM in response to OmriShpigel

I’m done with the Apple Watch so called Ultra I’ve tried every fix Apple suggested even replaced the watch but it stops reading my heart rate very sporadically during my workouts indoors/ outdoors etc. I’ve looked online tried everything I know. Apple is usually very responsive to issues with their products. I guess. They are too busy preparing for their “event” than addressing the concerns of their customers. You pay a premium price and I am ok with that but I expect premium service and solutions to problems . This is a widespread issue whether. It’s software or hardware . I was going to buy another Apple smart watch but not now. So I need a new smartwatch with a good fitness tracker any suggestions Garmin? If so which one ? Appreciate any advice ? Thanks !

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Apple Watch Ultra Heart Rate During Workout

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