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Beijing’s Air Quality Affects Olympic Athletes’ Performance

by Marlene Piturro, PhD, MBA • December 1, 2008

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Otolaryngologists, immunologists, and other physicians specializing in asthma, allergies, and additional respiratory disorders watched the 2008 Beijing Olympics with bated breath. They did not know if and how the city’s heavy air pollution and intense heat and humidity, combined with Olympic-caliber competition, would affect the substantial number of athletes at risk for such diseases.

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Explore This Issue
December 2008

Hazy and polluted air, long deemed asthmagenic by physicians, had caused problems at other Summer Olympic games, including those in Atlanta, Athens, and Seoul, but Beijing’s notoriously foul air presented athletes and visitors with an unprecedented respiratory challenge. Although Chinese bureaucrats ensured that there wasn’t much news coverage of the effect Beijing’s air quality had on athletic performance, being there showed just how difficult conditions were (see sidebar below).

Reynold A. Panettieri Jr., MDDespite efforts to protect athletes competing in outdoor endurance sports [in Beijing] from air pollution, there is no way to stop winds from carrying polluted air [from elsewhere in China] into Beijing.
-Reynold A. Panettieri Jr., MD

Before the Olympics started, scientists worldwide and casual observers expected the worst from Beijing’s polluted air. According to biomedical researchers at the University of Verona, Italy, Beijing is one of the world’s most polluted megacities. The concentrations of carbon monoxide, ozone, nitrogen oxides, sulfur dioxide, and particulate matter approach and often exceed the current limits established by the US Environmental Protection Agency as safe. Scientists also said that these air pollutants would be detrimental to athletes competing in Beijing due to the marked increase in ventilation rate (up to 20-fold) and concomitant oral breathing, which often bypasses the nose during strenuous exercise, increasing the deleterious effects of pollutants on the respiratory system and athletic performance. Beijing’s air is so polluted that, long-term, it has been found to be carcinogenic. Recent research at Peking University’s College of Environmental Sciences and Engineering on the city’s polycyclic aromatic hydrocarbons (PAHs) showed that 32% of residents were at risk of PAH carcinogenic inhalation, with an increased cancer risk of 15.3%. The inhalation of ambient air PAHs was shown to be a major risk factor in Beijing residents’ higher cancer occurrence.

Despite concerns about China’s long-standing problems with air pollution, the government downplayed its impact. Officially, as of August 23, Chinese authorities claimed that Beijing’s Air Pollution Index (API) had dropped by more than 20 percentage points compared with the same period in 2007. Major air pollutants on average dropped 40%, with nitrogen oxide emission directly related to vehicles down by 61%, and inhalable particulate matters falling 40%. One unanticipated factor that may have surprisingly eased Beijing’s pollution problems, particularly from taxis and buses, was a marked decline in tourism during the Olympics. Compared with the same period in 2007, the number of Chinese tourists dropped by a whopping 47%, while the number of foreign visitors decreased by 7.2%.

Pollution, Exercise, and Asthma

Reynold A. Panettieri Jr., MD, Professor of Medicine and Director of the University of Pennsylvania’s PENN Airways Biology Initiative in Philadelphia, has studied how exposure to ozone, a common air pollutant, may damage cells in the respiratory tract and cause a temporary decrease in lung capacity. Assessing Beijing’s herculean efforts to minimize air pollution prior to the Olympic Games, Dr. Panettieri stated that the Chinese government’s attempts might prove futile. Despite efforts to protect athletes competing in outdoor endurance sports [in Beijing] from air pollution, there is no way to stop winds from carrying polluted air [from elsewhere in China] into Beijing, he said.

Pages: 1 2 3 4 | Single Page

Filed Under: Allergy, Practice Focus, Rhinology Tagged With: allergy, asthma, athletics, Olympics, pollutionIssue: December 2008

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