Probably the feeling of dying after running. I'm not kidding. I really had this experience before. It was a particularly bad feeling, and my body was particularly uncomfortable. In the past two years, I was a person who didn't sleep in the early morning and stayed up almost every day. But at that time, I especially liked sports, such as dancing, running and doing flat support. At first, I may be fine, but I feel a little tired and uncomfortable. Later, if you sleep late the day before, you will exercise vigorously the next day. . . I still seem to have a fever after that shower, and then I feel weak and sore for the next few days. In fact, this is caused by staying up late, because it is not discomfort caused by sudden strenuous exercise, but physical exhaustion caused by poor mental state and lack of sleep. Now I feel lucky at that time, and I won't want to experience that feeling again. Headache, particularly bloated feeling, and serious physical exhaustion. I began to get into the habit of going to bed early this summer. All functions are not activated. If you lift iron, you will feel sudden death in minutes with the weight of daily training.