There is no more important exercise than stretching. Its neglect is one of the strange things in training. One who wishes to be stronger, to have the normal possession of all his faculties, powers and organs, can be initiated and secure the result most rapidly, by the use of this simple and elemental exercise.
The action of man's body consists of expansion, contraction and modulation, the latter being the union of the other two.
True energy expresses itself primarily by expansion. Life expands and any increase of new life and all positive emotions cause an increase of expansive activity in the body.
The study of expansion reveals to us the fact that expansion and contraction furnish the many elements of all human action, but that expansion is first, that expansion expresses joy, exhilaration, animation in life, and that contraction, aside from its co-ordination with expansion in causing control in intensity, expresses antagonism, hate, anger, pain. Accordingly this book assigns certain fundamental expansions, which everyone should practice and does practice if he obey his own deep instincts.
Negative emotions, such as fear, despondency, or antagonism, cause contraction and tend to constrict the vital organs.
It can, of course, be seen at once that expansion is due to the activity of the extensor muscles. The stretch is, in the main, an expansion. At any rate, it is always associated, co-ordinated, when properly performed, with expansion.
Moreover, if we observe the action of animals and all true spontaneous actions in a human being, we observe that the activity of expansion begins in the centre of the body. It is at this point that we should initiate our expression. The actions in the middle of the body are more conditional than those in the feet, hands, or limbs, but the awakening of conditions should precede modulation. A certain activity of expansion and diffusion is the very basis of all conditions.
All exercises should naturally begin with expansion. A true exercise means an increase of activity. Moreover, not only does life expand, but all positive emotions, such as joy, love, courage, cause activity of the extensor muscles. These emotions, as is universally known, improve health.