Eat less and eat more. When you start exercising, you must start to control your diet and eat as little as possible. If you are really hungry, you can eat a little, but you must eat less. This is to eat less and eat more. Choose some high-protein foods to eat, which is beneficial to increase muscle, such as chicken (light), fish, protein powder and so on. At the same time, carbohydrates should be supplemented after exercise to help muscle metabolism. Common carbohydrates are: carbohydrate drinks, porridge and so on. I wish you an early success!