Yoga
Hatha Yoga is a particular system of Yoga described by Yogi Swatmarama, compiler of the Hatha Yoga Pradipika in 15th century India focusing on the purification of the physical body as leading to the purification of the mind, and prana, or vital energy. Hatha Yoga in its many modern variations is the style that many people associate with the word “Yoga” today. Because its emphasis is on the body through asana (postures) and pranayama (breath control) practice, many western students are satisfied with the physical health and vitality it develops.
http://en.wikipedia.org/wiki/Yoga#Hatha_Yoga