Using latest iOS on both phone-11pro and watch- series 5, I see random readings of heart rate of 43 whilst sitting and watching TV. Yet through the night HR never drops below 68. Happened 2-3 times in last week. Rebooted both devices… can anyone suggest a possible reason for this?
iPhone 11 Pro, iOS 17
Hi selwynschwenk,
Thanks for posting in Apple Support Communities. First, we'd recommend making sure that your Apple Watch is snug to your skin since it will need that contact to capture an accurate reading. The following is from Get the most accurate measurements using your Apple Watch - Apple Support.
"To get the most accurate heart rate measurement when you use Workout, make sure your Apple Watch fits snugly on top of your wrist. The heart rate sensor should stay close to your skin. Learn about the accuracy and limitations of the heart rate sensor.
If you have an Apple Watch Series 3 or later, track your cardio fitness levels to measure how hard your heart is working during an outdoor walk, run, or hike in the Workout app.
If you turn off Heart Rate in Privacy settings, you also won't get a heart rate measurement. To see if Heart Rate is off or on, open the Watch app on your iPhone, then tap Privacy. "
If you need more help with this, Apple Support is in the best position to assist. You can reach out directly from Get Support.
All the best.
Random very low heart rate readings
