Obesity is a global health hazard and has been linked to numerous disorders such as dyslipidemia, type II diabetes, cardio vascular diseases and derangement of pulmonary functions. The mechanism for negative association of obesity with pulmonary functions is still debated. We assessed the association of Forced vital capacity and maximal voluntary ventilation parameters and body mass index by using a case control study. These parameters measured between obese and non obese groups were statistically analysed using student 't' test. Changes in expiratory time was statistically extremely significant ('p' <0.001) whereas forced vital capacity and maximal voluntary ventilation parameters were not statistically significant (>0.05).
