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. 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…Yoga Upanishads discuss different aspects and kinds of Yoga, ranging from postures, breath exercises, meditation (dhyana), sound (nada), tantra (kundalini anatomy) and others. Some of these topics are not covered in the Bhagavad Gita or Patanjali’s Yogasutras.