When playing badminton, instantaneous heart rate of 180 beats / min most of the normal situation, but the average heart rate of 180 beats / min, is generally considered to be fast heart rate. Healthy adults in a quiet state, cardiac output 5 ~ 6L, heart rate of 60 ~ 100 times / min; in strenuous exercise, cardiac output up to 25 ~ 30L, instantaneous heart rate of up to 160 ~ 180 times / min, but generally after rest, the heart rate can gradually fall back to normal levels. The pumping function of the normal heart has a considerable reserve, and the ability of this cardiac output to increase with the body’s metabolic needs is called the cardiac pumping function reserve or cardiac reserve. In strenuous physical activity, the body through the use of cardiac reserve to increase cardiac output, so the heart rate will accelerate. However, when playing badminton, the average heart rate of 180 beats / min, is too fast heart rate, most of these people also higher than the normal basal heart rate. It should be noted that, too fast heart rate, the heart can not contract in time, there may be insufficient blood supply to the heart, dizziness, fatigue, fainting, chest pain adverse reactions, need to pay attention to, should be avoided in daily life in strenuous activities. Warm tips: fast heart rate of the crowd, should not engage in strenuous exercise, if the body is not feeling well, should promptly seek medical treatment.