Is the heart rate the number of heart beats? What is the normal range? Is the heart rate data detected by the smart bracelet accurate?

Heart rate refers to the number of heartbeats per minute, which is within the normal heart rate range of 60- 120. Smart bracelets generally record and measure heart rate through photoelectric heart rate sensors. Some smart bracelets, such as mi band, will filter the data generated by the error through the professionally developed heart rate algorithm, making the heart rate data more accurate.