The heartbeat of normal people is controlled by the sinoatrial node of the heart, which is often called "sinus rhythm". The impact frequency of sinoatrial node is fixed. It is generally believed that the heartbeat of 60- 100 minutes is normal. In some cases, it is normal that the gamma value of the heart rate slightly exceeds 60- 100. For example, people who often participate in sports, especially athletes, may have a heart rate lower than 60 beats per minute, or those who sleep may have a heart rate lower than 60 beats per minute.
Normal heart rate usually refers to the heart rate or the number of beats of radial artery of forearm measured in minutes in a quiet state, which is generally 60- 100 times per minute. For athletes, the heart rate is slower than normal, and it is normal to be below 60 beats/min. After strenuous exercise, such as running and strenuous exercise, the heart rate will increase, exceeding 100 beats/minute. These transient changes are normal and do not need to be handled in a special MS.
Generally speaking, in a stable and normal state, the heart rate per minute should be kept at about 60 ~ 100. Once it exceeds this range, it is considered that the heart rate is too fast, and the heart rate is the number of heartbeats per minute. The normal heartbeat range is 60- 100 beats per minute. Less than 60 times is called bradycardia, and more than 100 times is called tachycardia. It is also normal for young people and heavy manual workers to have a heart rate of 50-60 beats per minute during sleep. When people are excited after exercise, it is normal for their heart rate to exceed 100 times per minute.