If you do it right, it can clear a foggy head, fight off laziness, combat stress, and make you feel more alert. It's been touted as a cure-all, although from the way the new popular yoga practitioners advocate it, you'd think it was new. It's basic, essential breathing, which can actually change you body chemistry and rock your world. Using breathing as a bridge to connect the mind and the body can be helpful. See how much you understand about this simple tension reducer.