Gupta Sunil Kumar, Elumalai Suresh Pandian
a Department of Environmental Science and Engineering , Indian Institute of Technology (Indian School of Mines) , Dhanbad , Jharkhand , India.
J Air Waste Manag Assoc. 2017 Oct;67(10):1137-1145. doi: 10.1080/10962247.2017.1344159.
Regular exercise improves physiological processes and yields positive health outcomes. However, it is relatively less known that particulate matter (PM) exposure during outdoor exercises may increase several respiratory health problems depending on PM levels. In this study, the respiratory deposition doses (RDDs) in head airway (HD), tracheobronchial (TB), and alveolar (AL) regions of various PM size fractions (<10, <2.5, and <1 μm; PM, PM, and PM) were estimated in healthy male and female exercisers in urban outdoors and within house premises. The highest RDDs were found for PM during morning hours in winter compared with remaining periods. RDDs in AL region for males and females, respectively, were 34.7 × 10 and 28.8 × 10 µg min for PM, 65.7 × 10 and 56.9 × 10 µg min for PM, and 76.5 × 10 and 66.3 × 10 µg min for PM. The RDD values in AL region were significantly higher in PM (27%) compared with PM (13%) and PM (2%) during exercise in all periods. This result showed that the morning peak hours in winter are more harmful to urban outdoor exercisers compared with other periods. This study also showed that the AL region would have been the main affected zone through fine particle (PM) to all the exercisers.
Size-segregated particle concentrations in urban outdoors and within house premises were measured. The highest respiratory deposition doses (RDDs) were found for PM during morning hours in winter compared with remaining periods. During light exercise, the RDD values in alveolar (AL) region for PM, PM, and PM for male exercisers were significantly higher, 20.4%, 15.5%, and 15.4%, respectively, compared with female exercisers during morning peak hours in winter.
规律运动可改善生理过程并产生积极的健康结果。然而，相对鲜为人知的是，户外运动期间接触颗粒物（PM）可能会根据PM水平增加多种呼吸道健康问题。在本研究中，估计了城市户外和室内场所中健康男女锻炼者不同PM粒径组分（<10、<2.5和<1μm；PM10、PM2.5和PM1）在头部气道（HD）、气管支气管（TB）和肺泡（AL）区域的呼吸沉积剂量（RDD）。与其他时间段相比，冬季早晨时段的PM10的RDD最高。男性和女性在AL区域中，PM10的RDD分别为34.7×10和28.8×10μg/min，PM2.5的分别为65.7×10和56.9×10μg/min，PM1的分别为76.5×10和66.3×10μg/min。在所有时间段的运动过程中，AL区域中PM2.5的RDD值（27%）显著高于PM10（13%）和PM1（2%）。该结果表明，与其他时间段相比，冬季早晨高峰时段对城市户外锻炼者危害更大。本研究还表明，AL区域将是所有锻炼者通过细颗粒物（PM2.5）受到主要影响的区域。
测量了城市户外和室内场所中按粒径分类的颗粒物浓度。与其他时间段相比，冬季早晨时段的PM10的呼吸沉积剂量（RDD）最高。在轻度运动期间，冬季早晨高峰时段男性锻炼者在肺泡（AL）区域中PM10、PM2.5和PM1的RDD值分别比女性锻炼者显著高20.4%、15.5%和15.4%。
