Yoga is an ancient science for healthy body, mind and spirit. The term 'Yoga' means union of the individual soul with the universal spirit. Yoga originated in India and is one of the six schools of Hindu philosophy, which aims at revitalization of an individual through various scientific techniques. Indian subcontinent has seen the practice of Yoga since time immemorial. Yoga is practiced with the purpose of liberating the hidden energies of the body through relaxation & control of the mind. As one masters the various 'asanas' of Yoga, a harmony is achieved mentally, physically as well as spiritually. People from all over the world come to India on Yoga tours to reinvigorate themselves. Although practiced all across India, the premier centre of yoga is located in Rishikesh. A number of ashrams here offer courses on meditation, yoga and Hindu philosophy.