Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; Faculty of Applied Sciences, Department of Radiation, Radionuclides and Reactors, Technical University of Delft, Delft, The Netherlands.
CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal.
Sci Total Environ. 2015 Sep 15;527-528:111-8. doi: 10.1016/j.scitotenv.2015.04.120. Epub 2015 May 14.
It is undeniable that many benefits come from physical activity. People exercise in fitness centers to improve their health and well-being, prevent disease and to increase physical attractiveness. However, these facilities join conditions that cause poor indoor air quality. Moreover, increased inhalation rates during exercise have influence on inhaled doses of air pollution.
This study aims to calculate the inhaled dose of air pollutants during exercise, by estimating minute ventilation of participants and measuring air pollutant concentrations in fitness centers.
Firstly, the 20 participants performed an incremental test on a treadmill, where heart rate and minute ventilation were measured simultaneously to develop individual exponential regression equations. Secondly, heart rate was measured during fitness classes and minute ventilation was estimated based on the calculated regression coefficients. Finally, the inhaled dose of air pollutants was calculated using the estimated minute ventilation and the concentrations of the pollutants measured in a monitoring program performed in 63 fitness classes.
Estimated inhaled doses were higher in aerobic classes than in holistic classes. The main difference was registered for PM10 inhaled dose that presented an average ratio between aerobic and holistic classes greater than four. Minute ventilation and PM10 concentrations in aerobic classes were, on average, 2.0 times higher than in holistic classes. Results showed that inhalation of pollutants is increased during heavy exercise, demonstrating the need to maintain high indoor air quality in fitness centers.
This study illustrates the importance of inclusion minute ventilation data when comparing inhaled doses of air pollution between different population groups. This work has estimated for the first time the minute ventilation for different fitness classes. Also constitutes an important contribution for the assessment of inhaled dose in future studies to be performed in fitness centers.
不可否认，体育活动带来了许多益处。人们在健身中心锻炼身体，以改善健康和幸福感，预防疾病，增加身体吸引力。然而，这些设施加入了会导致室内空气质量差的条件。此外，运动期间吸入率的增加会影响吸入的空气污染剂量。
本研究旨在通过估计参与者的分钟通气量和测量健身中心的空气污染物浓度，计算运动期间吸入的空气污染物剂量。
首先，20 名参与者在跑步机上进行递增测试，同时测量心率和分钟通气量，以开发个体指数回归方程。其次，在健身课程中测量心率，并根据计算出的回归系数估计分钟通气量。最后，使用估计的分钟通气量和监测计划中测量的污染物浓度来计算空气污染物的吸入剂量，该监测计划在 63 节健身课中进行。
有氧运动课中的估计吸入剂量高于整体健身课。主要的区别在于 PM10 的吸入剂量，有氧运动课的平均比值大于四。有氧运动课的分钟通气量和 PM10 浓度平均比整体健身课高 2 倍。结果表明，剧烈运动时会吸入更多的污染物，这表明需要在健身中心保持高室内空气质量。
本研究说明了在比较不同人群吸入的空气污染剂量时，纳入分钟通气量数据的重要性。这项工作首次估计了不同健身课程的分钟通气量。它还为在未来健身中心进行的研究中评估吸入剂量做出了重要贡献。
