Background: The autonomic nervous system plays a major part in preparing the human body to adapt to the constant environmental changes and stress by correcting the sensory, visceral, motor, and neuro endocrine functions. The present study was conducted to assess effect of yoga on autonomic nervous system of human body. Materials & Methods: 80subjects of both genders were divided into 2 groups. Group I were on regular yoga and group II had healthy subjects who do not practice yoga (control). Anthropometric measurements like height, weight was taken. BMI was calculated, and recordings of AFT were done in the morning.