Why are young people becoming more and more "sub-healthy"?

Sub-health has a high incidence rate in modern society, about 70%, which is common in people with high knowledge level and great pressure, such as white-collar workers and intellectuals. The common reasons are: 1, excessive stress and high pressure: once the pressure exceeds the human body's tolerance, it will destroy human health and immune function, resulting in low immunity and sub-health; 2, staying up late: the human biological clock is destroyed, leading to sub-health; 3, bad eating habits: overeating, smoking and drinking, as well as high-calorie, high-fat diet will cause obesity and lead to sub-health; 4, sedentary: qi and blood are not circulating, and qi and blood stagnation will lead to sub-health; 5. Environmental pollution, including noise pollution, water pollution and air pollution, is the main reason for the prevalence of sub-health.