The first aspect is that your blood sugar level will drop with the length of exercise, and your body will enter a state of hypoglycemia. In this way, your body will have a thirst for sugar, so after training, you are likely to drink a bottle of carbonated drinks or even have a big meal to satisfy your thirst for sugar, which will increase extra calories and consume more energy, which is completely opposite to your fitness purpose, right?

Second, when we are training, the body will secrete a substance called sebum alcohol. What about this substance? It starts to secrete in about 40 minutes to 60 minutes, and it will increase with the extension of time, which will be very bad for the body, because it will break down our muscles, so people don't want it, right?