Comparison of PM 2.5 concentrations in an indoor fitness center and an outdoor gym within Chulalongkorn University

Abstract

Exercise environments can be classified into 2 main types of indoor setting, and outdoor setting. The two settings then become a factor to consider of which to choose over another, considering PM₂.₅ concentration in the atmosphere. This project aimed to i) measure the concentrations of PM₂.₅ in the environment of indoor fitness center and outdoor gym in Chulalongkorn University, ii) observe the correlations between PM₂.₅, temperature, and relative humidity, iii) compare PM₂.₅ concentrations between indoor fitness center and outdoor gym in the different times of the day. The project is carried out by measuring the quality of the atmospheric air from an indoor fitness center and an outdoor gym precisely at the same time, using the air quality detector device Bosean Electric (LY062701). Starting from the 1st of April 2019 until the 26th of April 2019 for 12 days, three sessions a day: 08:00 - 09:00 A.M., 01:00 - 02:00 P.M., and 05:00 - 06:00 P.M... The data collected were then analyzed using descriptive statistic and Pearson’s correlation coefficient, and two-way ANOVA method. The analysis illustrated that the correlation between atmospheric PM₂.₅ concentration of indoor fitness center and outdoor gym is caused by infiltration from the outdoor air. Therefor the outdoor atmospheric PM₂.₅ concentration affects the atmospheric PM₂.₅ concentration of the indoor fitness center. Consequently, indoor fitness center is more favorable to those who concerns about PM₂.₅ exposure.