formance. When the graph indicates need of more application a
discussion between the tester and subject is indicated. The way is
often paved for instruction, inspiration and improved application.
With repeated fatigue curve production there comes a smoothening
out of the curves as the subject learns to apply himself.

Counting of pulse rates, like that of foot contacts, was done by
the subjects. By use of a 3-2-1 starting signal each subject felt of
his pulse and counted heart rates for ten seconds. Multiplication
by six gave the minute heart rate. A ten second check of the pulse ,
was made just before the first work period. Another check followed
the tenth period; and additional checks were made at two, four,
and six minutes after work ceased.

Samples of fatigue and improvement curves are shown here in
Figure 1 for the purpose of illustration. The subject was a high
school football player who was so much larger than most of his
opponents that he seldom was called upon for “all out’ effort.
The habit of partial effort he developed was reflected in the first
fatigue test. The first curve shows that he worked hard for two
innings; then loafed for two periods; and finished with a produc-
tion which clearly indicated that he had not done his best. His
seventh curve showed he had moved towards the goal of consist-
ently doing his utmost. ‘The “Curve of Improvement” shown here
is composed of the averages of fatigue curve performance compiled
in the series of tests given this individual.

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