This is a typical sign of abnormal sympathetic arousal. With regard to sympathetic arousal, patients can imagine themselves as being in a battlefield where they are about to sprint, when they generally appear to sweat profusely, have an accelerated heartbeat, and appear pale, with the main blood supply going to the vital organs of the body, such as the liver, spleen, heart, and brain. The purpose of the accelerated heartbeat is to transfer most of the blood quickly to the large organs of the body, as well as to the large muscle groups. Therefore, when the sympathetic nerves are excited, the patient can experience tachycardia. Conversely, if the patient’s heartbeat is significantly accelerated by light activity, the sympathetic nerves are overexcited. An ECG at rest should be done at the hospital first to determine if the ECG in the quiet state is a normal sinus rhythm. If the ECG is normal, you can squat in place, squat 15-20 times, and then immediately do the ECG again, if you find that the heart rate rises to more than 150 beats per minute, it is a significant sinus tachycardia. Such patients can usually do more aerobic exercise, 2-3 times a week, no less than 30 minutes each time. Long-term aerobic exercise can significantly slow down the rhythm of the sinus node of the heart and eventually the heartbeat. With reference to most athletes, long-distance runners tend to have sinus bradycardia, so patients in this category can also take this exercise to significantly slow down their heartbeat.