Kriya means action, and Kriya Yoga practices generally combine subtle head movements, breathing techniques, mantra and visualization to lead the practitioner into a meditative state. Paramahansa Yogananda was Kriya Yoga’s best-known exponent in the West, but there are a number of other lineages. For a more in-depth discussion of Kriya Yoga and the term Kriya, see Chapter Three of The Essence of Tantric Sexuality.