Normal range of heart rate variability of Huawei watches

14139 ms. According to Zhongguancun online information, the heart rate variability of Huawei watches refers to the change of the difference value in each heartbeat cycle, and the normal range is14139 ms. Heart rate variability is an important reference index to reflect the tension and balance of sympathetic and parasympathetic nerves, as well as the adjustment of heart rate by nerves and body fluids.