If you only exercise for a better figure, better muscle distribution and higher muscle content, then you don't need to control your diet, because the process of exercising muscles requires our bodies to have enough protein for our muscles to grow rapidly. For example, if you want to make muscles grow rapidly, you can buy some protein powder, which can help our muscles appear quickly. Although this kind of muscle is superficial, at least it seems to exist, which is enough to prove that people want to grow muscles when exercising.
If you exercise to lose weight, you should control your diet and reduce your carbohydrate intake appropriately. For example, you usually have to eat three bowls of rice, steamed bread and noodles to be full. Now you can control it properly, reduce it by half, eat five or six minutes full, eat two meals a day, and you can't eat less meat. Protein still needs to eat, or he will feel weak. The body's immunity will decline, and protein must be maintained. Sugar you usually eat can reduce your intake and make your body consume less energy, so you will naturally lose weight through exercise.
Diet control is not a particularly good way to lose weight, because simply controlling diet without exercise will do harm to your body and your stomach will be easily injured. It is the most reasonable way to lose weight by appropriately reducing diet intake and then increasing exercise. Of course, it's easier said than done. Few people can really keep exercising 1 ~ 2 hours a day, and then control their appetite all the time, if you can.