A high heart rate due to exercise can burn fat, pathologic ones generally do not. A high heart rate due to exercise can burn fat, and the higher the heart rate, the faster it burns fat. Because to achieve a certain intensity and a certain time, the greater the amount of exercise, the faster the heart rate, the more calories will be consumed, will burn more fat. Therefore, if you want to exercise to lose fat, you must have enough exercise intensity and time. Pathologically fast heart rate is generally not fat-burning and requires timely treatment, otherwise it may lead to cardiac arrest, etc. If the heart rate is abnormal, it is recommended to consult a doctor in time.