In short, what you said is the most superficial thing. Fitness can not only improve your muscles, so as to improve your appearance, make your body fit, symmetrical and straight, make your muscles elastic and shiny, prevent muscle aging and atrophy, but also have many benefits that you can't see. Fitness can speed up blood circulation, exercise the cardiovascular system and improve the working ability of your heart. At the same time, it can clean up harmful substances in the excretory system, make it difficult for harmful substances to stay and spread in the body, and prevent various cardiovascular diseases. That's great. This is one of the three killers of human health.

And the respiratory system. Your lungs get exercise to enhance your ability to inhale and use oxygen.

There is also the digestive system. Fitness can accelerate the process of body energy consumption. The ultimate source of energy substances is obtained through food intake. Therefore, it will promote the functional changes of the digestive system and enhance the digestive function of rice.

It can also improve the regulatory function of the nervous system, improve the ability of the nervous system to judge complex changes in human activities, and make coordinated, accurate and rapid responses in time.

It also has a great influence on people's hearts, emotional catharsis and so on. In short, there are many benefits. Let's exercise.