If the woman has any great amount of writing to do, she should learn to use a typewriter. In using this machine she not only writes very much more rapidly and easily, but the position of the body is much more erect than that assumed when using the pen, and it is not nearly so fatiguing to the muscles of the hands and arms.
All closely confining sedentary occupations, as writing, sewing, etc., should be frequently interrupted to move about for a few minutes, rest the eyes, and take a few deep breathing exercises before an open window; this is necessary for the eyes as well as for the ventilation of the lungs.
Ventilation of the Lungs and Breathing Exercises.—Forced respiration is essential to completely change the air in the lungs, to maintain the elasticity of the lung tissue, and to expand the chest in every direction. Only in this way can a thorough ventilation of the lungs take place; a full supply of oxygen is taken in, which stirs up, disinfects, and cools the stagnant residual air, and forced expiration expels the respiratory excretions. One of the frequent causes of foul breath is lack of ventilation of the lungs, so that the expired air becomes laden with impurities.
In normal breathing the current of air which passes in and out of the lungs travels through the nose, not the mouth. The ingoing air, by exposure to the vascular mucous membrane of the narrow and winding nasal passages, is warmed and moistened, and at the same time the mouth is protected from the desiccating effects of the continual inroad of comparatively dry air.
By means of respiratory exercises the mobility of the chest may be greatly augmented; there is an increased flexibility of the ribs and sternum, as well as loosening of the thoracic joints, which may have become stiff, and these exercises also lead to a development of the respiratory muscles.
In this manner only can the frame work of the chest become thoroughly inflated from within, and thus all parts of the lungs, which run the risk of becoming incapacitated from lack of use, be brought into play.
It is highly important that this thorough ventilation of the lungs should take place at least three times a day—the first thing in the morning, while making the toilet, again about the middle of the day, and at night just before retiring.
To obtain the greatest benefit from these exercises they must be taken without corsets, the clothing must be light and loose, and the body lightly clad. The air in the room must be fresh, and after they have been learned, they can, as a rule, be taken before an open window. In the morning they are best taken just after the cold bath, when, by removing the impurities and filling the lungs with fresh air, and at the same time starting up a good vigorous circulation, they cause one to begin the day with energy and zest.
The respiratory movements are diminished during sleep, and at the same time there is a large accumulation of blood in the splanchnic veins, so that, particularly when there is any tendency to difficulty with the breathing at night, the trouble is greatly lessened by filling the lungs with pure air just before retiring.
It is necessary, first of all, to learn the art of breathing, to be able to dissociate the clavicular, the costal, and the diaphragmatic. By clavicular breathing is meant the raising of the collar-bone and shoulders as high as possible by means of a slow but deep inspiration—this expands the apices of the lungs; costal breathing is the throwing out and expanding the chest to its utmost capacity, and so enlarging the chest in its transverse and anteroposterior diameters; diaphragmatic breathing is the depression of the diaphragm and the protrusion of the abdomen without raising the lower ribs. The last is the most readily learned in the supine position; the bed supports the weight of the body, so that the individual is able to concentrate her entire attention on fixing the bony thorax, depressing the diaphragm, and protruding the abdomen at every inspiration and retracting it to the utmost with every expiration. This, of course, develops and gives tone to the abdominal muscles.