Under normal circumstances, running will increase the heart rate, the heart rate reaches 160-170 times / minute normal phenomenon. If the usual amount of exercise is less, poor cardiorespiratory function, too obese, etc., it will lead to a significant increase in heart rate during strenuous exercise. If there are no obvious symptoms of discomfort, there is no need to worry too much, because the heart rate is related to cardiorespiratory function, age, intensity, etc., so the range of running heart rate is not fixed. For young people, running heart rate of 160-170 times / min may be normal, but if the middle-aged and elderly people running heart rate of 160-170 times / min, indicating that the heart rate is faster, too high heart rate may increase the burden on the heart, so that myocardial oxygen supply, blood supply reduced, if they suffer from coronary heart disease and other basic diseases, may induce myocardial ischemia, resulting in adverse consequences. According to the heart rate formula, that is (220 – age) × (60-80) %, the best heart rate range can be calculated when exercising, you can judge whether it is in the normal range, if the symptoms of discomfort should immediately stop running, rest is still not relieved, you need to go to the hospital in a timely manner. In addition, if the base heart rate is usually high, running will also appear the heart rate beyond the normal range, need to consider whether they suffer from certain diseases, such as hyperthyroidism, heart failure, anemia, etc., can lead to exercise when the heart rate increases. If you have previous illnesses, you need to consult your doctor before running, whether you are suitable for this exercise. It is recommended to choose the right intensity of exercise on a daily basis to avoid unnecessary hazards of high heart rate.