As the name implies, heart rate variability is the degree of change of heart rate, that is, the irregular beating of the heart, which is usually measured in milliseconds. Our heart rate and speed are not constant.
When it is quiet, such as sleeping, the heartbeat will be greatly slowed down; But when we exercise, such as running, our heart rate will increase rapidly. It can be seen that the heart is a very sensitive organ, which can adapt to the changes in human blood oxygen demand and adjust its own pumping speed.
The normal reference value of hrv of Apple Watch is 14 1ms plus or minus 39 ms. Of course, this thing is not a medical device, and it can't really express anything, because people's emotions and psychology are directly related. It is possible that what you think will affect your heart rate.
Functions of apple watch HRV;
HRV (Heart Rate Variability) of Apple Watch is a technology used to measure mental health and physiological stress response. It can measure a person's psychological state by measuring the time interval between two heart rate variability.
HRV is an effective method to reflect a person's internal state by measuring heart rate variability. It can help us better understand how our bodies and minds respond to daily sexual activities.
In addition to measuring mental health level and physiological stress response, Apple Watch HRV can also be used to detect many other health indicators, such as blood pressure and heart rate, as well as blood oxygen and blood sugar levels.
The normal range of Apple Watch HRV can also be used to help detect more health indicators of the body, including weight, waist circumference and nervous system function.
In addition, HRV can also be used to monitor a person's sleep, and measure the deep and shallow sleep state during sleep. HRV can also help us identify negative emotions.