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, breathe, workout, and recovery rates throughout the day; or take a new reading at any time.
Open the Health app on your iPhone.
Tap Health Data, then tap Heart.
You can see your heart rate over the last hour, day, week, month, or year. You can also see your resting, recovery, workout, walking average, and breathe rates; the maximum and minimum heart rates during the selected time period; and your heart rate variability.
By default, your Apple Watch monitors your heart rate for the Heart Rate app, workouts, and Breathe sessions. If you’ve turned off heart rate data, you can turn it back on.
Open the Apple Watch app on your iPhone.
Tap My Watch, then tap Privacy.
Turn on Heart Rate.