Condition or Costs in heartbeats was determined by the pulse
rates before and after the fatigue curve, at the same intervals.

Spot running was again used in the production of the fatigue
curve. Any skill similar to one involved in turning out piece work,
as fast as possible could have been used. The right foot contacts
were again counted for Production. Each individual was checked
in his Application for ten innings of ten seconds each, with ten
seconds rest between innings. The total foot contacts as skills were
interpreted as Production for that particular day. The Costs in
heartbeats were taken by the five pulse rates, one taken before pro-
duction of the fatigue curve, immediately after, and then after
two, four, and six minutes of rest.

Production went up and Costs came down from day to day as
condition improved as shown in Figures 5 and 6. Application
improved. Mastery of the skill improved. All improvements came
as the result of good guidance and intelligent leadership. After
twelve weeks, Production was up 45%, Costs were down 10%.
Improved condition allowed the Engineers to do more work with
less discomfort. If it isn’t necessary to be physically fit it is cer-
tainly worthy of attention and some efforts.

It may be noted that the continuity of progressive greater in-
creases in Production and decrease in Costs was broken July 28
by excessive temperature and higher humidity. In Figures 9 and
10 one can note the recorded improvement of the fourth day over
the first day. Production is greater and costs are lower in the later
day.

Please note below the averages plotted into the aggregate fatigue
curve in Figure 7 and the curve of condition in Figure 8. In the
fatigue curve the inhibition to production by fatigue can be noted
in each successive inning to indicate 100% application.

The curves of condition in Figures 8 and 10 demonstrate again
that with spurt efforts and then rest there is more recovery in the
first two minutes than there is in the next four. Actually with good
condition the recovery is more in the first two minutes rest, than
it is in the next thirty minutes. Recovery of original pulse rate after
the fatigue curve within two minutes rest, indicates fine condition.
The five pulse rates should not be over 450 in the best condition.
Some of the above group need more conditioning as is indicated
by the curve of condstion.