Why often bubble dance hall is harmful to health?

Dancing is a good for physical and mental health of the public recreation and social activities, in the appropriate occasions often dance, on the physical and mental pleasure, promote physical health is beneficial. But if often "bubble ballroom", especially often into the conditions are not very good, and many people dance ballroom, is detrimental to human health. This is because: (a) serious noise pollution

Scientific studies have shown that the sound more than 80 ~ 85 decibels, can be harmful to the human body. The ballroom is generally equipped with a larger power combination of audio, often in the 80 ~ 98 decibels or more. According to the test of a number of dance halls, whether it is singing and dancing "waltz", or hissing "disco", mostly more than 90 decibels, some as high as 120 decibels. Dancing under such strong sound will affect hearing to varying degrees, leading to damage to the nervous system, digestive system and endocrine system, resulting in dizziness, tinnitus, nausea, vomiting, tachycardia, elevated blood pressure and so on. (B) light pollution is serious

Dance halls installed in the laser light strong dazzling, coupled with bright and dark, rotating uncertainty, color and light and dark between the changes in a variety of dazzled, dazzled, it is easy to lead to increased intraocular temperatures, injury to the cornea, the conjunctiva, crystals, so that blurred vision, eyelid spasms, conjunctival congestion. If you are in this environment for a long time, some people will have a headache, dizziness, insomnia, mental laxity, loss of appetite and other reactions. Ultraviolet light is a must for every ballroom, because it has the role of treatment of skin diseases and sterilization, but if the control is not appropriate, ultraviolet lamps can also become one of the sources of light pollution: studies have shown that prolonged exposure to strong ultraviolet radiation can make the human body's proteins, enzymes and so on, which leads to the occurrence of certain diseases. As these pollutants are unknowingly carried out in people, can not be obviously perceived, and thus its harmfulness can not be underestimated. (C) serious air pollution

Sample surveys have shown that large and medium-sized city ballroom in the customer peak, an average of every 1.5 square meters area of the dance floor there is a pair of dance partners in motion. It can be imagined that such a dense crowd, but also in the poor ventilation conditions of the environment, the air pollution is how serious. Scientific research shows that the human body itself is constantly emitting a variety of gases at all times, including harmful gases accounted for 1 / 3. These harmful gases in the ballroom into a large number of accumulation, not easy to eliminate, so that air pollution is serious. In addition, because the ballroom temperature is high, the air is not easy to convection, is conducive to the propagation and growth of germs, according to some determination, found in the ballroom per cubic meter of air containing bacteria up to 4 million, for the ordinary indoor bacterial content of 4,000 times. In addition, the human body when dancing, frequent contact, closer, more bacteria to provide the conditions for the spread of certain infectious diseases become the dissemination of the place.

This shows that often bubble ballroom, on human health is harmful. Comparison, in recent years, in some towns and cities in the rise of square dancing, more beneficial to human health.