How to Fix Apple Watch Ultra Stop Tracking Heart Rate

Does your Apple Watch Ultra stops tracking heart rate in the middle of a workout?

With advanced monitoring sensors, your Apple Watch Ultra can keep track of your heart rate during workouts. 

Unfortunately, users are complaining that the heart rate monitoring feature on their watch stops working after a few minutes

To help out, we’ve decided to make a guide on how to fix this issue on your watch. 

Let’s begin!

1. Restart Your Watch. 

Whenever troubleshooting, it’s always good to start with the basics. 

Restarting your Apple Watch should allowyour device  to reload its resources and eliminate temporary issues. 

This should also flush its memory and clear corrupted data from various applications. 

Here’s how you can restart your Apple Watch Ultra: 

  1. First, press and hold the Side button until the sliders appear. 
  2. Hold the Power button and drag it to the right. 
  3. Wait for 10 to 15 seconds to ensure that your watch is turned off. 
  4. Next, hold down the Side button again until the Apple logo appears. 
  5. Wait for your watch to initialize. 
Apple Watch Ultra Buttons


You can’t restart your Apple Watch Ultra while it’s charging. 

Go back to your workout or activity and see if your watch will keep track of your heart rate. 

Related: How to Fix Apple Watch Exercise Ring Not Working

2. Adjust Your Apple Watch Ultra. 

Apple Watch Ultra is bulkier than regular Apple Watch due to its rugged build. 

Due to this, the watch tends to move around while doing physical activities. This can cause the heart sensor to malfunction or give inaccurate data. 

To avoid problems, ensure your Apple Watch Ultra is snug and fits on your wrist. 

Apple Watch Ultra stops tracking heart rate

Adjust the watch band and give it a few shakes to ensure that it stays in place. This should prevent your watch from going all over the place while jumping or running. 

You can also consider upgrading to a more durable watch band that can hold the watch securely on your wrist. 

3. Clean the Back of Your Apple Watch. 

Various sensors are located on the back of your Apple Watch. If you use it regularly for workouts, then the back glass can get dirty and block the sensors. 

To rule this out, give it a quick clean using a soft cloth. You can also rinse it under a tap and dry it afterward. 

Watch Ultra

See if your Apple Watch Ultra still stops tracking your heart rate.

4. Shave Hair On Wrist. 

If you have hair on your wrist, it might be the reason the heart rate tracking feature isn’t working correctly. 

As reported by many users, they were able to resolve the problem by shaving off hair on their wrists. This should allow the sensors to make direct contact with your skin and monitor your heart rate and pulse accurately. 

5. Turn Off Low Power Mode. 

You can try disabling low power mode on your Apple Watch Ultra if you are experiencing problems with the heart rate tracking feature. 

Power saving mode disables background heart rate and blood oxygen measurement. This can mess up your watch’s readings, causing the heart rate monitor to malfunction. 

Here’s how you can turn off the feature: 

  1. Touch and hold the bottom of your watch’s screen. 
  2. Wait for the Control Center to appear, then swipe upwards. 
  3. Tap on the battery percentage and turn off Low Power Mode
Apple Watch Ultra stops tracking heart rate

You can also turn off the feature by going to Settings > Battery > Low Power Mode

Continue your workout and see if your Apple Watch Ultra can now track your heart rate accurately. 

6. Force Restart Your Watch. 

We suggest force restarting your Apple Watch Ultra if you still encounter issues with heart rate tracking. 

This should restart your device on a hardware level, which cuts off power from the battery. 

Here’s what you need to do: 

  1. Hold down the Side button + Digital Crown for at least 10 seconds. 
  2. Release the buttons once the Apple logo appears. 
  3. Wait for your device to initialize. 
Apple Watch Ultra Buttons

Go back to your activity and check if the problem is solved. 

7. Update Your Apple Watch. 

A faulty or outdated version of watchOS could also be the culprit. To rule this out, check if there are available updates for your Apple Watch Ultra and install them. 

Follow the steps below to update your watch: 

  1. Launch the Apple Watch app on your paired iPhone
  2. Go to My Watch and tap on General
  3. Access the Software Update tab and see if there are available updates. 
Apple Watch Ultra stops tracking heart rate
  1. Download the update. If asked, provide your passcode to continue. 


  • It can take several minutes to an hour for the update to complete. 
  • Ensure that you have at least 50% battery on your Apple Watch before updating. 

Proceed with your workout after the update to check if heart rate monitoring works. 

Related: How to Fix Apple Watch Screen Not Responding

8. Visit the Apple Store. 

If none of the solutions above worked, we suggest bringing your Apple Watch to the nearest Apple Store

Your device may be suffering from a hardware issue. Some sensors could be faulty and need to be replaced. 

Apple Watch Ultra stops tracking heart rate

Before heading to the store, check if your device is still covered by warranty to know your options. 

If your Apple Watch Ultra is less than 14 days old, you can ask for a replacement or refund as long as the device was purchased directly from Apple. 

That ends our guide on how to fix your Apple Watch Ultra if it stops tracking your heart rate during workouts. 

For your questions and other concerns, feel free to leave a comment below, and we’ll do our best to help. 

If this guide helped you, please share it.


  • John Sixto

    John is a staff writer at Saint and comes from a SAP ABAP development background. He has a Bachelors in IT and has been writing since 2018, with over 500 posts published. He loves to build PCs and has a deep curiosity in understanding how different components and configurations work. John spends hundreds of hours at a time, researching and testing the software and apps, before he proceeds to write about it. LinkedIn X (Twitter)

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