Yoga (from the Sanskrit root yuj ("to yoke")) refers to a series of interrelated ancient Hindu spiritual practices that originated in India, where it remains a vibrant living tradition. Yoga is one of the six orthodox systems (darshans) of Indian philosophy. Its influence has been widespread among many other schools of Indian thought. In Hinduism, Yoga is seen as a system of self-realization and a means to enlightenment. It is also a central concept...