Human health includes physical health and mental health. A person's physical and mental health can be called real health. Comrade Fu Lian (Ri Zhang), a famous Chinese physician, believes that the meaning of health should include the following factors: (1) All parts of the body develop normally, have healthy functions and are free from diseases; (2) Strong physique, strong disease resistance, hard-working, undertaking various arduous tasks, and being able to stand the test of various natural environments; (3) Energetic, always keep a clear head, concentrate, concentrate, and maintain high efficiency in work and study; (4) Strong will, normal mood, and cheerful spirit (although this is related to ideological cultivation, physical health also has a great influence on it).
The definition of health by the United Nations World Health Organization is that health not only has no physical diseases, but also has a complete physiological, psychological state and social adaptability.