Introduction: Obesity is a global public health challenge. Recent trends in life style among young college students resulted in an increasing prevalence of obesity. Students are also exposed to daily stress due to increased work load and high expectations .This makes them susceptible to various health problems such as cardiovascular, metabolic, pulmonary and psychosocial disorders. Stress and obesity are interrelated cardiovascular comorbid conditions which burden the person further. This leads to sympathetic over activity, autonomic dysfunction and psychological disturbances in these young individuals. Thus there is a need of timely reduction of sympathetic over activity to overcome autonomic imbalance and stress among them .This can be done by introducing a simple easy technique of breathing, the diaphragmatic breathing which has proven effects. Objectives: This study aimed at to know the effect of diaphragmatic breathing on cardiovascular and psychological parameters in obese undergraduate students