This training of the spine has some valuable secondary and incidental results. Although these are connected with the improvement of health and eradication of disease, and as such are not the direct object of the training, their value remains a great one for sufferers. For instance, weak and painful backs can be the result of several different causes but one of them is faulty posture when walking. The following way of carrying the torso is bad: drawing the shoulders and chest too far back and pushing the abdomen too far forward. This curves the spine in the wrong direction and unnecessarily throws too much weight upon it.
-- Notebooks Category 5: The Body > Chapter 5: Exercise > # 45