Lung function is a well-established predictor of mortality and is used routinely in general health assessment. The objective of this study is to elaborate the importance of physical activity on lungfunction, focusing on daily activity as the domain parameter. Forty eligible medical students wereinterviewed for study parameters, answered GPAQ and underwent spirometry measurement. Alldata interpreted using an established method based on Pneumobile Project Indonesia. Comparisonbetween each level of physical activity (LPA) was assessed with Kruskall-Wallis test, followed byDunn’s multiple comparison post hoc test.The number of medical student with LPA and lung functionwere almost similiar in low and moderate plus high groups. The FVC in low, moderate, and high LPAare: 105.4±2.2% (n=20), 112.6±2.2% (n=17), and 118±6.3% (n=3), respectively. The FEV1 in lowLPA group is 109.2±2.4%, moderate 113.7±2.4%, and high 122±7.2%.Students with higher LPA areassociated with higher FVC, FEV1, and spent less time on sedentary activities weekly.