In running, the mass of our organs is agitated by violent and constant
shocks, which succeed with rapidity; but the abdominal members are
not the only ones in motion, although they are those in which the
developement is most considerable. Running developes not only the
abdominal members, but has a strong influence upon the respiratory
parts. This exercise is particularly suited to young persons,
especially those of a lymphatic temperament. It should not, however, be
practised after meals.