It is possible for a normal person’s heart rate to exceed 100 while working. Working means being in a state of exercise, and a heart rate of 100 beats per minute is normal in a state of exercise. Normal people’s heart rate will increase significantly during exercise, labor, excitement and nervousness. In the rest state, breathing is more calm, the normal heart rate is generally between 60 to 100 times per minute. If the heart rate is measured during or just after exercise, a heart rate of 100 beats per minute or more is normal and nothing to worry about. The main reason is that exercise will make the sympathetic nerves in an excited state, catecholamine secretion will increase, so it will temporarily cause the heart rate to accelerate. Normal people in the work of the heart will be more than 100 beats per minute, do not worry, generally in a period of rest, the heart rate will gradually return to normal. If exercise leads to obvious physical discomfort, such as dyspnea, angina, etc., patients are advised to go to the hospital in time.