The situation that causes fast heartbeat after exercise is mainly the following: 1, physiological, if the daily lack of exercise, the heart reserve capacity is relatively low, after strenuous exercise the body oxygen consumption will increase, which leads to fast heartbeat. This part of patients belong to physiological phenomenon, after physical exercise, can improve the heart function reserve, to achieve the purpose of relieving heart panic; 2, there are organic lesions, after the activity caused by panic, such as cardiac insufficiency patients, their own heart reserve function is low, the heart pumping function is poor, after strenuous activity will also lead to the feeling of heart panic. Some patients are anemic factors, which also cause panic and heartbeat after exercise. In addition, patients with hyperthyroidism may also experience panic attacks and increased heart rate after exercise.