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Outline
To understand the current situation of indoor particulate matter and microbial pollution in fitness centers in China, and their association with respiratory symptoms among practitioners.
In accordance with the National Health Risk Factor Surveillance Program for Public Places, this study investigated 280 fitness centers across 31 provinces(autonomous regions, municipalities) and the Xinjiang Production and Construction Corps from March to September 2022 (the warm season) and from October 2022 to February 2023 (the cold season). Air samples were collected to measure PM10, PM2.5,total plate count (TPC), and total fungal count (TFC), while a questionnaire survey was administered to practitioners. χ2 tests were employed to compare the exceedance rates of these air quality parameters across different geographical regions and seasons. Additionally, logistic regression analysis was conducted to examine the association between indoor air pollutant exposure levels and the prevalence of respiratory symptoms among practitioners.
Among the measured air quality parameters, airborne TFC exhibited the highest exceedance rate (21.74%), particularly in southern regions during the warm season. The exceedance rates for PM10, PM2.5, and TPC were 8.21%, 14.25%, and 0.23%, respectively. Respiratory symptoms were reported by 23.15% of practitioners, with significant differences (P<0.05) observed across age, smoking history, alcohol consumption, and length of service. Logistic regression analysis identified elevated concentrations of PM10≥225 μg/m3, PM2.5≥135 μg/m3, TPC≥500 CFU/m3, and TFC≥250 CFU/m3 as significant risk factors for respiratory symptoms among gym practitioners (P<0.05). The corresponding adjusted OR (95% CI) were 3.64 (1.77-7.48), 2.19 (1.15-4.16), 3.84 (1.66-8.90),and 1.63 (1.09-2.44), respectively.
Exposure to PM10, PM2.5, TPC, and TFC in fitness centers in China may increase the risk of respiratory symptoms among practitioners.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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