Yoga is a group of disciplines which includes physical, mental, and spiritual practices, originated in ancient India and aim to control and calm the mind and body. Pranayama is the yogic practice of focusing on breath. In Sanskrit, prana means "vital life force", and yama means to gain control. In yoga, breath is associated with the prana, thus, pranayama is a means to elevate the prana shakti, or life energies. Pranayama is described in Hindu texts like the Bhagavad Gita and the Yoga Sutras. In ancient literatures 8 different types of pranayam are described out of which nadi shuddhi or nadi shodhan pranayama is one. Anuloma Viloma is known as the level 3 of nadi shodhana pranayama