The Purpose of the study was to find out the effect of aerobic training on selected physiological variables. 30 male students from P.G.G.C, Sector-11, Chandigarh were selected randomly as the subjects for the study. The age of the subjects ranged between 18 - 21 years. The variables selected for the present study were aerobic training (independent variable), Resting Heart Rate (RHR) and Vital Capacity (VC). Pre test – post test randomized group design, which consists of control group (15 students) and experimental group (15 students) was used. The data were collected through the pre test, before training and post test, after six weeks of aerobic exercises training. For comparing pre and post test means of experimental and control groups of selected physiological variables, descriptive analysis and Analysis of Co-Variance (ANCOVA) were used, the data analyzed with the help of SPSS (16.0 version) software and the level of significance was set at 0.05 level of confidence. The result of the study showed that there was significant difference between pre and post test (experimental group) of Resting Heart Rate (RHR) and Vital Capacity (VC), Another hand there was insignificant difference between pre and post test (control group) of Resting Heart Rate (RHR) and Vital Capacity (VC). On the basis of the findings it was concluded that the aerobic training might be responsible for the improvement of selected physiological variables like Resting Heart Rate (RHR), Vital Capacity (VC).