Gurudev, in the Patanjali Yoga Sutras very little is explained about Asanas (yoga postures). Then why do people connect Asanas to Yoga?
Because that is what is visible on the outside. So people go on speaking and relating about what is visible to them. Hatha yoga (a branch or limb of Yoga dealing mostly with postures) is only a very small part of the Ashtanga Yoga (Eight fold path of Yoga). People misunderstand that alone to be what Yoga is all about. It is alright. That is also good for keeping the body healthy and free from diseases.