There is no clear medical rule on how soon you can do exercises after drinking milk. Generally about an hour can do gymnastics. Milk is rich in protein, fat, trace elements and other nutrients, so within an hour after drinking milk, a large amount of blood involved in digestion and absorption, which can help the absorption of nutrients. If you do exercises immediately after drinking milk, the blood involved in the limbs increases, and the blood involved in digestion and absorption in the stomach and intestines decreases, which may lead to the occurrence of indigestion. Therefore, it is generally recommended to do exercises one hour or so after drinking milk. But everyone’s constitution is not exactly the same, the specific situation also need to be based on personal constitution and living habits and other circumstances to judge.