Unfortunately, all conscious effort exerted in attempts at physical action causes in the great majority of the people of to-day such tension of the muscular system concerned as to lead to exaggeration rather than eradication of the defects already present. Therefore it is essential at the outset of re-education to bring about the relaxation of the unduly rigid parts of the muscular mechanisms in order to secure the correct use of the inadequately employed and wrongly co-ordinated parts. Let us take for example the case of a man who habitually stiffens his neck in walking, sitting, or other ordinary acts of life. This is a sign that he is endeavouring to do with the muscles of his neck the work which should be performed by certain other muscles of his body, notably those of the back. Now if he is told to relax those stiffened muscles of the neck and obeys the order, this mere act of relaxation deals only with an effect and does not quicken his consciousness of the use of the right mechanism which he should use in place of those relaxed. The desire to stiffen the neck muscles should be inhibited as a preliminary (which is not the same thing at all as a direct order to relax the muscles themselves), and then the true uses of the muscular mechanism, i.e., the means of placing the body in a position of mechanical advantage, must be studied, when the work will naturally devolve on those muscles intended to carry it out, and the neck will be relaxed unconsciously. In this case the conscious orders, by which I mean the orders given to the right muscles, are preventive orders, and the due sequence of cause and effect is maintained.