Abstract
Purpose: This study aimed to investigate the effects of mask type and wearing during class on concentration and respiratory function.
 Methods: A total of 90 college students were included in this study. These participants were divided into three groups: group 1, no mask (n=30); group 2, dental mask (n=30), and group 3, KF94 mask (n=30). Respiratory function tests were performed in all groups, as well concentration ability test before and after 2 hours of class. All data were analyzed using SPSS window version 22.0.
 Results: The difference in respiratory function according to the mask type and wearing was statistically significant in FVC, FEV1, and concentration ability except for FEV1/FVC (p<.05). As a result of post-hoc analysis, FVC, FEV1, and concentration ability values were significantly lower in the group not wearing a mask (p<.05). FVC, FEV1, and concentration ability were significantly lower when wearing KF94 than when wearing a dental mask (p<.05).
 Conclusion: It was found that the more masks with a high blocking grade, the greater the decrease in concentration. Therefore, it is recommended not to wear a mask or wear a low-blocking-grade mask in order to maintain concentration on the class, except for cases with underlying diseases or low health risks in conducting face-to-face classes in the future.
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