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Cutter, Calvin, A Treatise on Anatomy, Physiology, and Hygiene: designed for Colleges, Academies, and Families, Boston: Benjamin B. Mussey and Co., 1852.
Exercise favors the deposition of both animal and earthy matter, by increasing the circulation and nutrition of bone. It is already known that bones increase in size and strength by use and are weakened by inactivity. Exercise of the muscles increases the action of the vessels of that part to which the tendons are attached, and thus increases the nutrition and size of that portion of bone. Regular exercise is part of the treatment for rickets. Frequent use of the muscles causes its fibers to increase in thickness and become capable of acting with greater force while the unused muscle decreases in size and power. Muscular action also leads to an increased flow of blood in the arteries and veins, creating an more rapid deposition of the particles of matter of which composes muscles.
Cutter, 53, 62, 85.
Regular and Frequent
Cutter, 91, 95.
Riding, walking, employment, archery, quoits, playing ball, dancing, whatever the activity it is important that every part of the muscular system have its appropriate share of exercise.
Cutter, 86, 91-92.
Morning, when air is pure & the ground dry is better than evening, severe exercise & labor should be avoided immediately before or after eating a full meal or severe mental toil.
A walk should be brisk enough as to produce rapid respiration & circulation of the blood.
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