is important for several reasons. In the first place, there is an
old saying, which happens to be true, "Never let your blood-vessels
get stiff." In addition we should call on the tremendous reserve
which Nature gives to us, at least once in a while.

[Illustration: "COUNTING OFF" A COMPANY IN THE YALE GYMNASIUM]

[Illustration: "HEAD" POSITION. GROUP OF ONE HUNDRED, SENIOR CORPS]


WATER, WALKING, AND FOOD

Water plays a very important part in the life of man, for without it a
person can live for only a short time. Its importance is shown by
experimental fasts lasting for thirty days where only water was taken,
and when we consider that the body is composed of from 60 to 70 per
cent, of water and that the amount which it throws off as waste has to
be replaced through nutrition, we realize the value of water to life.
The average person, therefore, should take from two to four quarts of
water a day.

[Illustration: RESULT OF SIXTY DAYS' TRAINING IN CARRIAGE. THE TWO MEN
IN FRONT WEIGH 265 AND 230 POUNDS RESPECTIVELY]

[Illustration: LOOK AND DETERMINATION ON FIRST DAY'S MARCH, DURING WHICH
THE MEN CARRIED IRON BARS WEIGHING NINE POUNDS EACH]

At middle age it is natural for most people to put on weight, unless
they are especially active in their daily life. For, having acquired a
habit of consuming a certain amount of food, it is absolutely essential