With the modernization¹ of the world, people’s standard of living has improved a lot. Then there appears a state of sub-health among people which poses² a new threat to them.

There are some symptoms for people who are in a state of sub-health. First of all, those who suffer from it often have a headache or backache. Secondly, they feel like having a rest frequently. What upsets us most is that, the situation spreading countrywide. As a result, more and more workers in big cities are harassed³ by it, with a percentage of 75 in Beijing, 72 in Shanghai and 70 in Guangzhou respectively⁴.

Then how can we solve this problem? Experts suggest that the best way to keep ourselves healthy is to do exercises. It is also very important that people should form a good living habit, for example, getting up early and going to sleep early. Only doing so can we keep us healthy.