Your AppleWatch can tune in to your heart and send notifications when something out of the ordinary occurs. For example, your AppleWatch can notify you if your heart rate remains above a chosen threshold or below a chosen threshold after you’ve been inactive for at least 10 minutes.
You can turn on heart rate notifications when you first open the Heart Rate app, or at any time later.
You can also receive a notification if your AppleWatch has identified an irregular heart rhythm that appears to be atrial fibrillation (AFib). If you have already been diagnosed with AFib, your AppleWatch can help you understand how frequently your heart is in this arrhythmia. You can also track lifestyle factors that may influence your condition.
Receive high or low heart rate notifications
Open the Settings app
on your AppleWatch, then tap Heart.Tap High Heart Rate Notifications or Low Rate Notifications, then set a heart rate threshold.
on your AppleWatch, then tap Heart.You can also open the AppleWatch app on your iPhone, tap My Watch, then tap Heart. Tap High Heart Rate or Low Heart Rate, then set a threshold.
Set up irregular heart rhythm notifications (not available in all regions)
You can receive a notification if AppleWatch has identified an irregular heart rhythm that appears to be atrial fibrillation (AFib).
Open the Apple Watch app on your iPhone.
Tap My Watch, tap Heart, then tap Set Up Irregular Rhythm Notifications in Health.
In the Health app, tap Set Up, then follow the onscreen instructions.
Show AFib history (not available in all regions)
If you have been diagnosed with AFib, open the Health app on your iPhone, then tap Browse.
Tap Heart, scroll down to Get More From Your Health, tap Set Up under AFib History, then follow the onscreen instructions.
To show your AFib history, open the Health app, tap Browse, tap Heart, then tap AFib History.
Every Monday, if you have worn your watch for at least 5 of 7 days (12 hours a day), you may receive a notification with an estimate of the time you spent in AFib during the previous calendar week.
For more information, see the Apple Support article Track your AFib History with Apple Watch and Atrial Fibrillation History Feature (AFib) Instructions for Use (IFU).
Receive low cardio fitness notifications
AppleWatch can provide you with cardio fitness estimates by measuring how hard your heart is working during an outdoor walk, run, or hike, and send you a notification when it’s low. Depending on your age and sex, your cardio fitness will fall into one of four ranges: Low, Below Average, Above Average, or High. If your cardio fitness level falls in the “Low” range, you’ll receive a notification on your AppleWatch. If it stays low, you’ll receive a notification every four months.
Open the Settings app
on your AppleWatch.Tap Heart, tap Cardio Fitness Notifications, then turn on Cardio Fitness Notifications.
You can also open the AppleWatch app on your iPhone, tap My Watch, tap Heart, then turn on Cardio Fitness Notifications.
Look in the Cardio Fitness section of the Health app to see your cardio fitness measurements and the range they fall into. Tap Show All Cardio Fitness Levels for more information.
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