The word yoga is derived from the Sanskrit word "Yog", which means "unity" or means to join. This unity or joining is described in spiritual term as the union of Shakti (energy) with his consort Shiva (the supreme consciousness) and this is the central theme of yoga. At Varanasi, there is a great tradition of Yoga learning and this continues even to this day. Traditionally, Ashrams and Muths have been the center of Yoga practice and learning and with the establishment and development of modern institutions of learning, Yoga has been given due place in their curriculum.
There are separate faculties and departments of Yoga, Ayurveda, and Meditation and Astrology in B.H.U. and Sampurnanand Sanskrit University. Varanasi is the center for Yoga, Ayurveda, Meditation and Astrology. Following are main centers for Yoga, Meditation and Astrology.