Yoga Upanishads are a group of minor Upanishads of Hinduism related to Yoga. There are twenty Yoga Upanishads in the anthology of 108 Upanishads listed in the Muktika anthology.[1][2] The Yoga Upanishads, along with other minor Upanishads, are generally classified separate from the thirteen major Principal Upanishads considered to be more ancient and from the Vedic tradition.[3]
The Yoga Upanishads deal with the theory and practice of Yogic techniques, with varied emphasis on methodology and meditation, but with some shared ideas.[2] They contrast from other groups of minor Upanishads, such as the Samanya Upanishads which are of a generic nature, the Sannyasa Upanishads which focus on the Hindu renunciation and monastic practice, the Shaiva Upanishads which highlight aspects of Shaivism, the Vaishnava Upanishads which highlight Vaishnavism, and the Shakta Upanishads which highlight Shaktism.[3][4]
Date
The composition date of each Yoga Upanishad is unclear, and estimates on when they were composed vary among scholars. According to Mahony, they likely are dated between 100 BC and 1100 AD.[5] However, Gavin Flood dates the Yoga Upanishads to the 100 BCE to 300 CE period.[6][note 1] According to James Mallinson, some Yoga Upanishads were revised in the eighteenth century to incorporate the Hatha Yoga ideas of the Hindu Natha sub-tradition.[8]
Yoga Upanishads discuss different aspects and kinds of Yoga, ranging from postures, breath exercises, meditation (dhyana), sound (nada), tantra (kundalini anatomy) and others.[6] Some of these topics are not covered in the Bhagavad Gita or Patanjali's Yoga Sutras.[10]