Apple Watch heart rate variability 30

Is the heart rate variability of Apple Watch 30 normal? This question? Normal. The normal range of rate change is10ms to150ms. The heart rate variability monitored by Apple Watch is 30ms, which means it is within the normal range. Heart rate variability reflects the health of the heart. Apple Watch helps to detect heart problems, myocardial infarction and arrhythmia in time by monitoring the heart rate variability of users. When an abnormal situation occurs, Apple Watch will remind users to seek medical treatment to avoid serious consequences caused by delayed treatment.