The normal heart rate of a forty-eight year old woman should be 60-100 beats per minute at rest, and may increase during exercise. Generally speaking, the normal resting heart rate of a forty-eight year old woman should be 60~100 beats per minute, and may be slightly lower than 60 beats per minute if measured by an athlete or in a sleeping state. During exercise, the heart rate may exceed 100 beats per minute, depending on the intensity of the exercise. If the heart rate does not match the above criteria, and if palpitations, chest pain, dizziness, headache, blackouts, fainting, dyspnea, etc. occur, it is necessary to be alert to the presence of certain diseases. It is recommended to consult a doctor as soon as possible to complete ECG, cardiac ultrasound and other related examinations to determine the cause of the disease and receive standardized diagnosis and treatment.