Aim:-The aim of this study was to compare the effect of running training on lung functions of runners and nonrunners and whether the regular exercise and training given to the runners improve the lung functions or not. Methods:-The subjects selected for this study were 40 runners and 40 nonrunners of aged 18-21 years.The mean value of Ht and Wt of runners were 167.52+_6.449 (cm), 56.55+_6.97 (kg) and that of nonrunners were 161.87+_6.44 (cm), 57.17+_9.129 (kg). Mean value of Ht in runners was more than that of nonrunners due to regular physical activity and training. There was no difference in wt in both groups.The mean values of Forced vital capacity (FVC), Forced expiratory volume (FEV1) at one second and Maximum voluntary ventiliation (MVV) in runners were 3.73+_0.78(L) 3.39+_0.78(L) and 120.09+_25.8(L/MIN) respectively and in nonrunners were 3.16+_0.59(L),2.98+_0.53(L) and 88.74+_28.74(L/MIN). Results:-There were significant increased in FVC, FEV1and MVV in runners than nonrunners may be due to training there is improvement in the lung functions and strengthing of respiratory of muscles