Focus on the "pollution trap" of gymnasiums: low standard fitness or getting hurt.

  "Practice three or nine in winter and three volts in summer." With the popularity of indoor gymnasiums, weather changes can no longer stop people’s enthusiasm for sports. In winter, when the cold wind is howling outside, many people will choose to exercise indoors in a relatively warm place. However, when you are sweating in the gym, have you ever thought that the surrounding environment may be unhealthy? In fact, there are all kinds of pollution in the gym. If you don’t pay attention, fitness will become harmful.

  If the ventilation is not good and the disinfection is not timely, fitness may become harmful.

  "I often come here, and it takes at least an hour every time I count running and practicing equipment." In an underground gym in Chaoyang District, Beijing, Xiao Yang, who works in a financial institution, just finished exercising. "Especially in winter, it is cold and foggy outside, and the indoor fitness is warm and clean."

  There are not a few people who have the same idea as Xiao Yang. The gym is indeed warmer than outdoor, but is it really "cleaner" than outdoor? Experts pointed out that there are actually many hidden "pollution traps" in the gym. If you don’t pay attention, fitness may become harmful.

  First of all, the newly opened gym may have decoration pollution problems. Indoor decoration materials, sports equipment, yoga mats and other fitness products are made of various materials, each of which may become a source of pollution.

  Secondly, the location of many gyms "underground" itself is a hidden danger. "The ventilation environment of the underground building structure is relatively closed, and people’s breathing volume increases during fitness, which is 1-mdash of daily activities; 2 times, the concentration of carbon dioxide in the air will rise. " Guangsheng Song, director of the National Indoor Interior Environment and Environmental Protection Product Quality Supervision and Inspection Center, said that radon pollution still exists underground. Radon is a gas, which comes from soil. The more underground space there is, the more radon there is. If it is not ventilated in time, radon will stay in the underground water and air, and excessive inhalation will be harmful to lung health. "Even in the above-ground fitness venues, due to the high indoor population density, special attention should be paid to supplementing fresh air." Zhao Bin, a professor at the Department of Architectural Technology, School of Architecture, Tsinghua University, said.

  "The gym is like going to jiaozi for a long time, a ‘ Spinning bike ’ There are countless people using it at the end of the day, and the handle of the car is sweaty, which makes people feel really uncomfortable. " Xiao Yang’s worry is not unreasonable. Experts say that people sweating a lot in the gym will increase the possibility of bacterial reproduction, and epidemic bacteria will spread with sweat and breathing.

  In addition to the problem of going to the gym itself, the influence of the outdoor environment can not be underestimated. If the gym is not equipped with an air purifier, or the purification device in the fresh air system is not turned on in time and the pipes are not cleaned frequently, outdoor air pollution such as smog will "penetrate" into the room, affecting human health.

  The diving venue of Rio Olympic Games turned green inexplicably, and urea in many swimming pools in Beijing exceeded the standard. In our life, is it safe for swimmers to come into contact with the water when they jump in by the pool? In this regard, Guangsheng Song said that if the swimming pool is built underground or semi-underground, radon may exceed the standard. Due to the swimming pool to ensure a certain temperature, poor ventilation will lead to an increase in air humidity, which will cause health burden to people with respiratory diseases. Disinfection is not timely or excessive, which will affect the water quality. "When swimming, human skin and mucous membranes are exposed, and disinfection is unqualified, which is easy to cause cross infection." Huang Peng, an associate professor in the Department of Sports Rehabilitation of Beijing Sport University, suggested this.

  The environmental quality of gymnasiums needs to be paid attention to urgently because of the low standard and weak supervision.

  As early as 2005, the Beijing Municipal Sports Bureau issued the "Beijing Gymnasium Safety Management Code", requiring that "the fresh air volume of gymnasiums with mechanical ventilation devices should not be less than 20 cubic meters/person/hour; The environmental noise inside and outside the gym should meet the national standard requirements; The fitness equipment of the operating gym should be disinfected every two hours, not less than 4 times a day, and so on.

  Such a specific specification seems to let everyone see that the fitness environment is guaranteed, but experts and practitioners disagree. "In fact, this standard is not harsh, but it should be stricter." Zhang Yinping, director of Tsinghua University Building Environment Testing Center, explained that the indoor fresh air volume of ordinary office buildings in China is 30 cubic meters/person/hour, and 20 cubic meters/person/hour is not a high standard. "People have a strong metabolism during exercise, and the demand for fresh air is greater than usual. 20 is the demand under ideal indoor conditions. Once there are more indoor air pollutants or a large population density in a certain space, this standard will be low. "

  Mr. Qian, the person in charge of an underground gym in Dongcheng District, Beijing, said that although he was aware of this specification, it was difficult to meet all the standards in actual operation. "on the one hand, it is limited by cost, and it is impossible to disinfect the equipment once every two hours. On the other hand, we don’t have professional testing equipment. Although we keep ventilation every day, we don’t know whether the fresh air volume is higher than 20 cubic meters/person/hour, let alone ‘ The noise shall meet the requirements of the national standard ’ What exactly does it mean? " He revealed that although there are norms, no one has ever checked them.

  "After SARS, China required relevant public places to clean the central ventilation and air conditioning system regularly, but only a few people really did." Zhao Bin told reporters that indoor and outdoor environmental pollution is different in performance — — Sewage discharge has polluted rivers and poisoned fish and shrimp, which can be seen in a short time. However, the impact of indoor environment on human health is not obvious in the short term, which is difficult to quantify, but the long-term cumulative impact is considerable. Therefore, everyone must enhance their awareness of maintaining the indoor environment.

  Compared with other factors, the indoor fitness environment is difficult to guarantee, and the most important thing is that the lack of supervision leads to the ineffective implementation of the norms. The publishers and supervisors of the regulations make the indoor fitness environment almost a gray area of supervision. "The current technical means can completely realize the real-time monitoring of various indicators of the indoor environment. A corresponding information disclosure system should be introduced, and third-party testing should be enabled, so that qualified laboratories can supervise gymnasiums and report data at any time to help the government supervise. " Guangsheng Song said that the standardized management of gymnasiums is a comprehensive issue, which needs the linkage of all departments. Public health supervision departments and other relevant responsible units should strengthen cooperation to monitor and guide the environment of gymnasiums.

  Try to go to the underground fitness places as little as possible. Operators should improve the indoor environment and be responsible for customers.

  Since the gym is not necessarily "healthy", what should we pay attention to when exercising indoors?

  Pan Xiaochuan, a professor in the Department of Occupational Hygiene and Environmental Hygiene of Peking University College of Public Health, said that poor ventilation may lead to a relatively insufficient indoor oxygen supply, which will increase the burden on the human respiratory system. Long-term exercise in a very stuffy environment, especially for middle-aged and elderly exercisers who like treadmills, is at risk of cardiovascular diseases induced by short-term hypoxia. Guangsheng Song said that when choosing a gym, consumers must pay attention to the indoor environment, such as good ventilation, equipment without peculiar smell, and go to underground places as little as possible. When the weather is fine, do more outdoor sports.

  Zhao Bin reminded that even if there is no decoration pollution in the gym, only high carbon dioxide concentration will cause the so-called sick building syndrome (SBS), and exercise in such an environment will have a negative effect. "For example, people who stay in a confined space for a long time will feel chest tightness and headache, which is the reaction of inhaling excessive carbon dioxide. China requires that the indoor carbon dioxide concentration should not exceed 800PPM. In underground densely populated spaces, the concentration of carbon dioxide is easily exceeded. "

  However, how can we know whether the carbon dioxide concentration in the gym is too high? "The human body itself is like a sensor. If you have symptoms such as dizziness, headache, general weakness and abnormal redness of your cheeks during exercise, you must be vigilant and go to a well-ventilated place to relieve it as soon as possible." Zhao Bin said, "In addition, gym operators should have a sense of responsibility, measure the concentration of carbon dioxide regularly, and increase the supply of fresh air once it exceeds the standard. In areas with high smog such as Beijing, the installed fresh air system should be specially filtered. "

  Huang Peng pointed out that the gym is a commercial organization, and it is understandable to seek profits. At present, the more large chain venues with more consumers, the more attention will be paid to reducing environmental pollution and improving safety measures. Therefore, consumers should try to choose a larger fitness venue. "Fitness, health is in the first place. Operators should realize that the gym is not about the size of the area or the number of equipment, but the good environment is the key. "

  In view of the operator’s "limited cost", Zhang Yinping said that in the long run, the gym’s investment in environmental protection will not increase the cost, but will save money for the gym. "Take the heat recovery system in the fresh air system as an example. Because of the heat recovery device, a part of the discharged hot and humid air will heat the incoming cold and dry air, which not only improves the air quality, but also saves electricity."

  It is gratifying that more and more operators have realized the importance of a good environment. Chen Bowen, who runs a gym in Fengtai District, Beijing, recently purchased a batch of air purifiers for the gym. "Customers are very happy. Everyone saw our responsible attitude towards indoor environment and consumer health and introduced their friends here. Recently, people who come to exercise have also increased. " Chen Bowen said with a smile.