Apple Watch Series 5 features an innovative new display that allows the time and important information to remain visible at all times. Each watch face has been carefully optimized for the new display and to preserve battery life, the screen intelligently dims when a user’s wrist is down and returns to full brightness with a raise or a tap.
Check your watch’s background refresh settings via your iPhone. Open the Watch app on your iPhone. Select General and tap Background App Refresh. Verify that you turned on Background App Refresh. Then, scroll down the list of apps to ensure that the Heart Rate option is on.
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