Because in deep sleep, people's heart rate is usually lower than that in awake state, which is a natural physiological reaction of the body. If the heart rate is still high during deep sleep, it may be that there are some problems in the body, such as cardiovascular diseases, respiratory problems, or other diseases in the body.
If the bracelet often records high heart rate during deep sleep, it is recommended to consult a doctor, who may advise you to do further examination to ensure your health.
Generally speaking, Huawei bracelet shows that the heart rate is 90 during deep sleep. Although this heart rate is within the normal range, we should pay attention to this situation. If the heart rate continues to be high, consult a doctor in time.