The exercises of horseback, however, are most particularly useful
where there is a tendency in the constitution to pulmonary consumption,
either from hereditary or accidental causes. It is here beneficial, as
well through its influence on the general health, as more directly on
the lungs themselves. There can be no doubt that the lungs, like the
muscles of the body, acquire power and health of function by exercise.
Now during a ride this is obtained, and without much fatigue to the
body. The free and equable expansion of the lungs by full inspiration,
necessarily takes place; this maintains their healthy structure, by
keeping all the air-passages open and pervious; it prevents congestion
in the pulmonary circulation, and at the same time provides more
completely for the necessary chemical action on the blood, by changing,
at each act of respiration, a sufficient proportion of the whole air
contained in the lungs,--all objects of great importance, and all
capable of being promoted, more or less, by the means in question.
And be it remembered that these remarks apply with equal force to the
girl as to the boy. She should be allowed, and even encouraged, to take
the same active exercise. Fortunately, this course is followed during
childhood; not so, unfortunately (in the majority of cases, at least),
after this period.
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