Check your heart rate on Apple Watch Ultra
Your heart rate is an important way to monitor how your body is doing. You can check your heart rate during a workout; see your resting, walking, workout, and post-workout heart rates, and your heart rate during a Breathe session; or take a new reading at any time.
Note: Make sure that your wrist and your Apple Watch Ultra are clean and dry. Water and sweat can cause a poor recording.
See your heart rate
Open the Heart Rate app 
on your Apple Watch Ultra to view your current heart rate, resting rate, and walking average rate.
Your Apple Watch Ultra continues measuring your heart rate as long as you’re wearing it.
See a graph of your heart rate data
Open the Heart Rate app on your Apple Watch Ultra.
Tap Current, Resting Heart Rate, or Walking Average to show your heart rate throughout the day.
To see your heart rate data over a longer period of time, open the Health app on your iPhone, tap Browse, tap Heart, then tap an entry. You can show heart data for the last hour, day, week, month, or year.
Turn on heart rate data
By default, your Apple Watch Ultra monitors your heart rate for the Heart Rate app, workouts, and Breathe and Reflect sessions. If you’ve turned off heart rate data, your can turn it back on.
Open the Settings app
on your Apple Watch Ultra.Go to Privacy & Security > Health.
Tap Heart Rate, then turn on Heart Rate.
You can also open the Apple Watch app on your iPhone, tap My Watch, tap Privacy, then turn on Heart Rate.
Note: The back of your Apple Watch Ultra needs skin contact for features like wrist detection, haptic notifications, blood oxygen level measurements, and the heart rate sensor. Wearing your Apple Watch Ultra with the right fit—not too tight, not too loose, and with room for your skin to breathe—keeps you comfortable and lets the sensors do their job. For more information, see the Apple Support articles Wearing your Apple Watch and Monitor your heart rate with Apple Watch.
For more information about Irregular Rhythm Notifications, see the Apple Support article Heart health notifications on your Apple Watch, and the document Irregular Rhythm Notification Instructions for Use (IFU).