About Hatha Yoga
Hatha yoga also known as Hatha Vidya, is a particular system of Yoga introduced by Yogi Swatmarama, a sage of 15th century India, and compiler of the Hatha Yoga Pradipika. In this treatise Swatmarama introduces Hatha Yoga as 'a stairway to the heights of Raja Yoga', hence a preparatory stage of physical purification that renders the body fit for the practice of higher meditation. The Asanas and Pranayama in Raja Yoga were what the Hindu Yogis used to physically train their body for long periods of meditation.