Yoga is an exercise for soothing the mind and stopping it to distract here and there. It was invented by some Hindu scholars and after finding it's usefulness in life it was mentioned in our scriptures as a way to a good life style. So, Yoga is not simply an exercise but a life style. Today the whole world is awakened to its potential and usefulness. Whether it is confirmed scientifically or not people have already benefited by it immensely.