Running does not generally improve second-degree AV block. Second-degree AV block is a kind of slow arrhythmia, patients may not have any symptoms, some patients may have palpitations, when the heart rate is too slow or accompanied by other lesions, there may be fatigue, dizziness, fainting, angina pectoris, heart failure and other symptoms, and even temporary loss of consciousness, convulsions, sudden death and other symptoms. If the patient does not have underlying heart disease and has no symptoms, it is possible to run normally, but it should not be too strenuous. If there is underlying heart disease or obvious symptoms, it is not recommended to run, which is easy to induce arrhythmia, and you can do more gentle exercise. Running does not improve second-degree AV block and may aggravate the condition or cause recurrence. It is recommended that patients actively under the guidance of the doctor for treatment, no slow heart rate and asymptomatic patients can not be special treatment, but regular checkups. Patients with symptoms can be treated by burying a pacemaker.