participants actually did improve concurrently with the improve-
ment of their fatigue curve. Edgar Jones, a great athlete in high
school, college, and later in the Army, consistently ran good appli-
cation curves with some at 100% in this series.

Condition in Costs and Recovery
from Measured Efforts

The fatigue curve has been established as a medium to measure
efforts and Application. The Costs of those efforts and the time
and degree of recovery can be evaluated by heartbeats as deter-
mined by pulse rates.

A series of fatigue curves for measured Production and Appli-
cation and the accompanying Costs was run in different age groups
over varying periods of time. ‘There was a continuity of progressive
Production in each of the series. The results of each day and the
effects upon successive days may be noted in the various occasions
of operation.

1. Junior High School Series—-Training and Conditioning

A series of fatigue curves produced by Munhall, Pennsylvania,
Junior High School under Robert Baierl. Fifteen students each
produced a fatigue curve daily for five successive days. ‘Their
pulse rates were recorded before and after each curve to evaluate
condition. |

The fatigue curves followed the usual pattern of less returns with
increasing fatigue. Below are the figures of the first and fifth days
which are plotted into a typical graph in Figure 3. The averages of
all participants are listed by innings to record Production and
Application.

Innings 1 2 3 4 5 6 i 8 9 10 Production Application
First Day 33 29 28 27 28 28 27 26 25 24 278 10%
Fifth Day 35 34 33 32 31 30 29 27 26 25 3801 100%

The first day’s average Production was 278 with Application of the
group at 70%. After four days of training, conditioning, and prac-
tice, there was a greater average Production of 301 and better
Application to 100%.

The pulse rates, indicative of heart and circulatory action, were
taken before the production of the fatigue curve, immediately

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