24 Cte

6 7 Ss 2 fo
!

 

 

lowest ae rs

 

Figure 15. (Aircrew Series—Arms) Eight Composite Fatigue Curves Illustrating
Progressively Improved Production. Arms fatigue in the usual pattern of declin-
ing returns from efforts. The approximately 200 Aircrew soldiers discovered they
could use their arms much better with improved training.

 

 

 

 

+180 a
160 se
140 2]
120 a
100 4
6h
ve
6/12
80 oy
BEFORE AFTER 2 MIN. 4 mn. 6 MIN. i

 

Figure 16. Composite Curves of Condition Corresponding to Four of the Days
Shown in Figure 15. The subsequent curves of condition show less cost in heart-
beats as condition improves. Greater work with less cost in heartbeats is the
sign of improving condition. 36