The veracity of modern medical science is based on controlled clinical trials. Vital capacity is a product of the interaction of a biological organism with the social environment. It is the way an individual adjusts with his external environment, and responding to the environment. The purpose of the study was to investigate the effect of Aerobic training, Hatha yoga, and combination of aerobic training and hatha yoga on Vital capacity of college level female students. Method: Subjects were divided into four equal groups on random basis (Groups A, B, C &D) consisting of 25 subjects in each group. Three out of the four groups were given experimental treatments i.e. aerobic training (Group- A), Hatha yoga (Group- B) and combination of aerobic training and hatha yoga (Group-C) and while the remaining one group (Group- D) was designated as control group. Results: Aerobic training, hatha yoga and combination of aerobic and hatha yoga is found to be more significant difference in Vital capacity of college mail students. Conclusion: The aerobic training is found to be more effective in changing the Vital capacity in comparison to the effect of hatha yoga training and combination of hatha yoga and aerobic training on aforesaid Vital capacity.