Abstract
Purpose: Obesity causes reduced lung function due to alterations in the lungs and chest wall. This study aimed to compare lung function based on body mass index.
 Methods: This study recruited 31 participants, which were divided into 2 groups (overweight group and control group). We assessed forced vital capacity (FVC) and FVC% predicted in order to compare lung function. The Mann-Whitney U-test was used to compare FVC and FVC% predicted between the overweight group and the control group.
 Results: The results indicated that the FVC and FVC% predicted were significantly lower in the overweight group compared to those in the control group (p<.05).
 Conclusion: The results of this study imply that being overweight has a negative impact on lung function. Therefore, management of body mass index is recommended to improve lung function in overweight individuals.
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