Yoga, according to the teachings of B.K.S. Iyengar is a rigorous method, based on the development of its sensitivity and perceptions of the postural alignment, directional direction and energy flow of the asana. It sometimes uses supports, to allow beginners to approach and have a better understanding of asanas, as well as to propose therapeutic applications and adaptations and also to allow everyone to practice according to their possibilities and limitations. Courses are divided according to levels, beginners, intermediate and advanced. Specific courses for special cases are also taught separately.