For your reference, here is more information about the heart rate reminder:
1. When the watch is in a quiet state, it starts monitoring for ten minutes (if it exits the quiet state during this period, the monitoring stops);
2. After ten minutes, if the average heart rate is detected to be higher or lower than the set value, the watch displays a reminder interface indicating the heart rate is too high or too low.
Note:
During exercise and within 20 minutes after the end of the exercise, the high heart rate (inactive), low heart rate reminder, and abnormal heart rate reminder checks will not be carried out.