Yoga is reputed to improve our physical and mental health, and to help us become more productive at work, more caring in relationships, and more responsible contributors to society. If yoga does accomplish all thatand most practitioners will swear its truehow exactly does it do it? Believe it or not, there are answers. And they are based in how the human body/mind functions, how we are built and wired, and how what we do can direct and change that. Drawing on modern neuroscience, ancient wisdom ...