In Light on Yoga by B.K.S. Iyengar the King of all asanas is Salamba Sirsasana known as Fully Supported Head Pose (also known informally as head balance). There are several different variations of headstand depicted in Light on Yoga. This yoga posture requires knowledge on how to achieve correct muscular skeletal alignment in the yoga pose. Working with a Certified Iyengar Yoga Teacher can help you stay on the right path to have success in this yoga asana. In Light on Yoga B.K.S. Iyengar explains some the effects of Salamba Sirsasana, “Regular and precise practice of Sirsasana develops the body, disciplines the mind and widens the horizons of the spirit.”