Body & Brain, formerly called Dahn Yoga, is a business founded in 1985 by Ilchi Lee that teaches a Korean physical exercise system called Brain Education. In Korean, dahn means "primal, vital energy", and hak means "study of a particular theory or philosophy". News sources have described its exercises as "a blend of yoga, tai chi, and martial arts exercises". Body & Brain is taught through for-profit studios as well as community centers. Ilchi Lee's Brain Education is considered pseudoscience.
There is a wide variety of schools of yoga, practices, and goals in Hinduism, Buddhism, Jainism and other traditional and modern yoga styles practiced worldwide.
Within the major branches of yoga such as haṭha, lāya, rāja, jñāna, and bhakti there are many different schools and lineages, both extant and defunct.
Since the late 19th century, a great number of distinct new styles of "Yoga" have been introduced by individual teachers.
Some schools and traditions are occasionally .