Abstract

Diving is an activity that is performed in more than one atmospheric pressure (atm). The dives will make some changes in the lung physiological conditions, that is caused by several factors i.e. the atmospheric pressure, the oxygen pressure, and nitrogen. These factors can lead to the increase of lung vital capacity. The purpose of this study to determine differences of lung vital capacity (VC) and forced expiratory volume in one second (FEV1) between the divers and non-divers. This study is an observational analytic. The design of this study is cross-sectional with case-control approach. The amount of this study samples was determined using the Slovin’s formula, the results is 56 samples. The number of samples obtained in this study was 118 respondents which consist of 59 divers and 59 non-divers as controls. The technique of data collection is using primary data in the form of questionnaires and the calculations of VC and FEV1 with spirometry test. Data were analyzed using the Mann-Whitney test statistic. With the results of Mann-Whitney statistical test shows that there is significant difference between the VC and FEV1 of the divers and non-divers with p = 0.000 (p <0.05). Based on the results of the study, lung vital capacity and forced expiratory volume in one second of the divers are larger than the non-divers.