Second, if it still hurts the next day, it means that it has not recovered. Actually, it's not good to practice like this. If you practice like this for a long time, you may become more and more tired and bored.
Third, this frequency is not specified and varies from person to person.
Finally, talk about the principle of motion. If a person wants to grow muscles, he can't do without exercise and protein. It is best to practice in three points and eat in seven points. If a person doesn't practice often, or has little strength, his muscles will ache the next day if he practices too much. This is the swelling pain caused by muscle congestion, and blood is to deliver nutrition to people. If your muscles recover, you don't need extra support. When you practice dumbbells until they are sore, your muscles have been exercised and need extra nutrition. The next day, if you don't feel the pain, you will recover. The reason is that you often exercise, and you are young and recover quickly. Generally, people who recover quickly are teenagers in their early twenties or adults who often do strenuous exercise. Because your abdominal muscles have not yet developed, you should belong to the former. Some people feel sore the next day, but their strength will increase after long-term exercise, indicating that the load is not very high. Although their recovery is not complete, it is almost the same. If the long-term overdraft is serious, they will only get weaker and weaker. Exercise is to persist for a long time, not to practice a lot at once. For example, if you eat alone, you'd better eat a proper amount of food every day and eat three meals instead of three days. Let's talk a little more here. Ancient military commanders often fought for a day or several days in a row, and even had no time to take off their armor, and perhaps even had little time to eat. A warrior often has a "general's belly", which means eating a lot, because all his strength comes from rice. And the more you eat, the longer your endurance, just like the greater the battery charge at the same time. Eating meat is better than eating rice. This is equivalent to the storage mode of batteries. Rice is electricity, and highly nutritious food is a bit like nuclear power, which lasts longer than electricity. So before the war, you can eat for a day without eating. Now, unlike before, we have enough time to eat, so we have become scientific meals. Water is very important to human body. With more water, it is convenient to transport nutrients and excrete toxins from the body. The muscles of the whole body are trained in this way. You can try to make your body feel better as long as you have time. As long as you practice more, you will feel better. If you feel more tired, it means that you are overworked. You can rest for a day or two, and then you will feel good. If you don't pay attention, you will talk too much and you can't do anything without thinking. You have to think for yourself and practice for yourself. Many martial arts masters not only practice hard, but also learn to use their brains flexibly, instead of sticking to fixed moves.