Compared with the subway, the subway is an indoor environment. When the population density increases in the morning and evening rush hours and people get close to each other, the ventilation effect becomes worse and unbearable. Moreover, in a relatively closed space, people can produce 5 million small particles every minute, such as falling dander, fibers on clothes, dust on soles and so on. , can be inhaled at any time. And the subway is a semi-closed underground space.

Dust may mainly come from tunnels and air conditioning systems, suspended in the air, and it is difficult to be discharged outdoors. Moreover, when the train enters the platform, the index of the dust tester is improved to a certain extent. This shows that the tunnel contains a lot of dust. In stations with large traffic, the dust concentration is generally high.

So it's best to wear a mask when taking the subway. Because of working underground for a long time, it is difficult to breathe healthy and fresh air, which is the root cause of pharyngitis. Many people don't know, in fact, the air quality of subway stations is very poor, especially when the station is in reclamation construction.

Many experienced subway people know that during this period, subway stations were full of all kinds of building materials, construction, dust particles and vacuum cleaning everywhere. It is in this environment that subway people patrol the station, ready to find one hazard after another. In order to alleviate this symptom, besides walking, exercising and exercising, there is also a good way, that is, massage or foot bath.

Many hot spring clubs have this service, and the price is not expensive. Generally, the group purchase will not exceed 100 yuan, and light meals or self-help are also provided. After finishing, I feel that my head, neck and shoulders are very relaxed, and the massage on the soles of my feet will make people's stress and fatigue disappear. I do it once or twice a month, and a team is together. Being as comfortable as possible is not only conducive to good health, but also helps to strengthen the unity and cohesion of the team. This is a good way of leisure and entertainment.