Identifier: keepingphysicall00crom (find matches)
Title: Keeping physically fit; common-sense exercises for the whole family
Year: 1916 (1910s)
Authors: Cromie, William J. (William James), 1877-
Subjects: Physical education and training
Publisher: New York, The Macmillan company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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of an extraordinary^ inspiration,30 mm. Hg.The elasticity of the lungs, in fact of all thetissues of the body, tends to beoome less withadvancing years. When the skin loses its elas-ticity it becomes wrinkled and on account ofits being permanently stretched and no longertightly adapting itself to the underlying struc-ture, is tliro\\m into folds. What is true of theskin is also true of the lungs; the elasticity andsuction they exert diminish. )\Iany women visit the massage expert, menthe barber shop, in order to have the face mas-saged. It is observed that massage of the facetends to keep away wrinkles, and gives a healthyglow to the skin, making its functions more ac-tive. Just as the skin may be preserved andnourished by a rich supply of blood through theagency of massage and proper care, so may thesuction and elastic properties of the lungs bepreserved by the ^massage or deep-breathingexercises such as are illustrated in this paper. Ofcourse, the lungs should be carefully protected
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c^ -5^ !« oP. 98 Keeping Physically Fit from bronchitis, pneumonia, coughing, etc., andall straining exercises where the thorax remainsfixed should be avoided. A number of men have experimented in de-termining the force of the inspiratory and ex-piratory muscles. The early workers were Halesand Hutchinson of England, while those ofmore recent date are Bonders and Waldenburgof Germany. This force is measured by meansof a graduated U-shaped glass tube partly filledwith mercury to one end of which is attached aflexible tube, which is applied to the mouth ornose. In ordinary breathing, according toWaldenburg, the mercury moves from 1 to 2mm.; in forced breathing the movement is muchgreater. In average adult men, inspiratory force variesfrom 80 to 100 mm. Hg., expiratory force from100 to 130 mm. Hg. In women the former isrepresented by from 60 to 80 mm. Hg., thelatter by from 20 to 110 mm. Hg. It will be seenby these figures that expiratory force is aboutone-third greater than inspiratory

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