This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... IV THE DEVELOPMENT OF THE CHEST Too much attention cannot be given to the development of the "bony-cartilaginous cage that contains the heart and lungs." The widening and deepening of the "chest" is of vital importance, for here we find the never-ceasing pump and the machinery for the ventilation of ...
Read More
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... IV THE DEVELOPMENT OF THE CHEST Too much attention cannot be given to the development of the "bony-cartilaginous cage that contains the heart and lungs." The widening and deepening of the "chest" is of vital importance, for here we find the never-ceasing pump and the machinery for the ventilation of the blood. It was shown in the chapter on the standing position, page 18, that the erector spinas group of muscles (back muscles) do much to maintain the erect posture. It is equally true that these same muscles are most active in arching the thorax and in raising the ribs. This brief chapter presents the principles that should govern us in the selection of exercises to correct flat chest, funnel and pigeon breast, and other forms of thoracic asymmetry. 1. Arch the thorax by the contraction of the back muscles. 2. Elevate the ribs by raising the arms above the head. (Fig. 9.) 3. Increase the capacity of the lungs by deep breathing and by active leg work, running, ropeskipping, etc. 4. Develop the heart by active leg work. Fig. 7 Diagram of the displacement of the ribs and sternum in inspiration: a indicates the degree of upward movement; 6, that of forward movement. (Testut. Gerrish.) The above simple principles may be condensed into one general law, i.e., to widen and deepen the thorax, raise the ribs. Movements of the ribs and the thorax as a whole. When breathing in, the thorax is enlarged in its three diameters--transverse, through, and vertical. The increase in the vertical diameter is caused partly by the elevation of the upper ribs, and the resulting widening of the spaces between the ribs, but is mainly due to the action of the diaphragm. The increase in the other two directions is due to the movements of the ribs, which are greatest...
Read Less
Add this copy of A Manual of Physical Training, for Boys and Girls: for to cart. $56.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
