through the system, and follows with progressive walking, a little
hill-climbing, and, later in the development, with some weight-carrying
exercises. The system renews the resistive force of the body, tones up
the muscles, opens the chest cavity so that the heart and lungs have
more room and the breath is deeper and better, gives general exercise to
the various muscles which have become more or less atrophied from
disuse, and brings about a marked improvement in the mental outlook and
in the animal spirits.

The system is a combination of setting-up exercises with outdoor work,
all carefully and precisely laid out after twenty years of experience in
conditioning men. It should be followed absolutely, not partially or
occasionally. It is far from severe. Its strength lies in the cumulative
effect rather than in any special effort at any one time.

It should be said that a mental effort is requisite in this course as
well as the physical one. The correlation between mind and muscle must
be re-established. The man must become master of his body once more and
retain that mastery. Certain suggestions are also given specifically as
to living--none of them irksome, but quite essential if the full result
of the work is to be attained.

This was the first experiment of its kind, and hence it has proven of
especial interest. There are plenty of cases of individuals taking up
exercise in one form or another and benefiting somewhat by it; but when
twenty to one hundred men in a group have engaged in this Senior Service
work, the result has proven remarkable in every instance. The question
seems to be simply this: If you are over military age and wish to renew
your youth, and are willing to pay the price by devoting some three or
four hours a week to a scientifically tested system, and can secure a