Is the health monitoring function of smart bracelet useful?

The health monitoring function of the smart bracelet generally refers to the functions of step counting, heart rate detection, sleep monitoring and so on. Exercise step counting can generally count the amount of exercise you do in a day, and it can play a role in understanding your own situation and self-monitoring, while sleep monitoring can also know your sleep time and quality. Heart rate detection can be used as a reference. Too slow or too fast heart rate will cause vigilance, go to the hospital for examination.