Yoga is starting to be used as a substitute and also replacement for drugs in the psychiatric community. That is precisely the goal Narayanan had in mind when he showed to teach the scientific side of the discipline as well as change the belief of yoga as a merely a excellent way to stretch.
However, this isn't exactly a new discovery. It's long been known that yoga is excellent exercise and those that regularly practice seem to become immensely healthier than their sedentary counterparts.
Fortunately, yoga is starting to gain real traction as a potential replacement for standard medical treatment. Even well known, superstar tv doctors like Dr. Oz make the effort out of their busy days to carry out a few minutes of yoga.