PHYSIOLOGICAL EFFECTS 
173 
AN ATTEMPTED ANALYSIS OF THE COMPONENTS OF THE TOTAL ENERGY TRANS- 
FORMATIONS INCIDENTAL TO SEVERE MUSCULAR WORK. 
Throughout the whole of this investigation it was apparent that during 
severe muscular work we had to deal with a number of complicated factors. 
Emphasis has already been laid upon the influence of the intensity of the mag- 
netization of the field and the speed. Unfortunately the evidence as presented 
can throw but little light upon the effect of training, but the various methods 
of computing the efficiencies show that with different loads and with different 
speeds there were unquestionably different types of muscular action. 
In the concluding paragraphs of this book an attempt will be made to 
analyze the various components of the energy transformations of the body 
incidental to severe muscular work. 
The great differences between the efficiencies when the subject rode 
with a light load and those when he rode with a heavy load are clearly ex- 
plainable only on the ground of extraneous exertion and inadequate adjust- 
ment of the muscles to the load, i. e., imperfect correlation. Aside from this 
irregularity in correlation, there must be an extra consumption of energy 
which is not directly productive of external muscular work. 
An analysis of the results obtained when work with a light load pre- 
ceded and followed work with a heavy load emphasizes the probability of a 
difference in the muscular activity under different conditions. The results 
of several experiments which give definite information upon this question are 
accordingly collected in table 137, the light work in all cases being done with 
a current of 0.5 ampere through the magnetizing field, and the severe work 
with a current of 1.5 amperes. 
Table 137. — Comparison of oxygen intake in light toork experiments before and after 
severe work. 
Light work (0.5 amp.) 
Light work (0.5 amp.) 
Subject and date. 
before severe work. 1 
after severe work. 1 
Revolu- 
Oxygen 
Revolu- 
Oxygen 
tions per 
intake per 
tions per 
intake per 
minute. 
minute. 
minute. 
minute. 
c.c. 
cc. 
K. H. A, Mar. 7, 1912 
79 
79 
1,070 
1,082 
Apr. 3, 1912 
79 
1,052 
79 
1,061 
M. A M., Mar. 12. 1912 . . . 
71 
72 
72 
797 
807 
814 
• 
Mar. 13, 1912 . . . 
72 
72 
837 
848 
Mar. 14, 1912 . . . 
70 
71 
70 
833 
787 
833 
Mar. 18, 1912 . . . 
71 
823 
Feb. 28, 1912 
102 
1,170 
100 
1,134 
104 
1,254 
99 
1,215 
Mar. 4, 1912 
102 
100 
1,061 
1,148 
99 
1,173 
1 The severe work was done in all the experiments with a current of 1.5 amperes through 
the magnetizing field. 
From the noticeable influence of severe muscular work upon the resting 
metabolism which is shown in the preceding section (see table 136) it would 
be reasonable to suppose that after the severe work-period, if the subject 
