Hatha yoga
The earliest references to hatha yoga are in Buddhist works dating from the eighth century. The earliest definition of hatha yoga is found in the 11th century Buddhist text "Vimalaprabha", which defines it in relation to the center channel, bindu etc. Hatha yoga synthesizes elements of Patanjali's "Yoga Sutras" with posture and breathing exercises. It marks the development of asanas (plural) into the full body 'postures' now in popular usage and, along with its many modern variations, is the style that many people associate with the word "yoga" today.