Yoga is a union of mind, body, and spirit . The background of yoga exercise is long and also steeped in custom. Yoga exercise is an old system of health and fitness which stemmed in India. The word yoga has its very first reference in the Rig Veda, the oldest of the spiritual texts. Those that study Yoga price quote its age to be 4 thousand years. The background of Yoga can be divided into 4 major periods which are the pre-classical period, classic period, post-classical period, and contemporary duration. In the background of yoga, guide is called the yoga exercise sutras. The background of yoga would certainly not have been completed in the timeless stage of yoga.