170 
MUSCULAR WORK 
Table 136.— Metabolism of subjects lying on the couch without food before and 
after work — Continued. 
[Figures in italics represent duration of work, heat equivalent of work, and the oxygen consumption 
per minute during the last period of work.] 
Elapsed 
Carbon dioxide 
Oxygen 
Heat 
time 
eliminated. 
absorbed. 
output 
Pulse-rate. 
Res- 
from 
end of 
work to 
(computed) . 
Res- 
pira- 
pira- 
Date. 
Increase 
Increase 
In- 
tory 
Increase 
rate 
begin- 
ning of 
period. 
Per 
min. 
after work. 
Per 
min. 
after work. 
Per 
min. 
crease 
after 
work. 
quo- 
tient. 
Per 
min. 
after work. 
per 
min- 
ute. 
Amt. 
P.ct. 
Amt. 
P.ct. 
Amt. 
P.ct. 
1912. 
C.C. 
ex. 
C.C. 
c.c. 
cals. 
p. ct. 
Mar. 19' 
205 
242 
1.17 
.85 
63 
20 
Work: 67 min. 138 cals.' 2,263 c.c. 
16 min. 
240 
35 
17.1 
260 1 18 I 7.4 I 1.29 1 10.3 1 0.92 
72 
9 
14.3 
24 
42 min. 
221 
16 
7.8 
251 9 3.7 1.23 5.1 .88 
63 
24 
lh.4 m. 
220 
15 
7.3 
254 12 5.0 1.24 6.0 .87 
64 
i 
1.6 
20 
Work: 58 min. 112 cals. 2,146 c.c. 
17 min. 
222 
17 
8.3 1 276 1 34 1 14.0 1 1.33 
13.7 1 0.81 
70 
7 
11.1 
20 
Mar. 25 1 
205 
... 1 242 1 . . 1 ... | 1.17 
«=; 
63 
20 
Work: 58 min. 125 cals. 2,655 c.c. 
10 min. 
277 
72 
35.1 
284 1 42 1 17.4 1 1.42 
21.4 
0.97 
95 
32 
50.8 
26 
33 min. 
258 
53 
25.9 
271 29 12.0 1.35 
15.4 
.95 
89 
26 
41.3 
26 
58 min. 
261 
56 
27.3 
275 33 13.6 1.37 
17.1 
.95 
87 
24 
38.1 
24 
Work: 49 min. 98 cals. " 2,288 c.c. 
11 min. 
271 
66 
32.2 
281 
39 
16.1 
1.41 
20.5 
0.97 
101 
38 
60.3 
20 
31 min. 
249 
44 
21.5 
267 
25 
10.3 
1.33 
13.7 
.93 
88 
25 
39.7 
22 
Mar. 27 l 
205 
242 
1 17 
8K 
63 
20 
Work: ~62 min. ideal's.' 2, 2 5 7 c.c!" 
11 min. 
261 
56 
27.3 
255 13 1 5.4 1 1.29 
10.3 1 1.02 
88 
25 
39.7 
24 
33 min. 
223 
18 
8.8 
256 14 5.8 1.25 
6.8 .87 
75 
12 
19.0 
20 
57 min. 
214 
9 
4.4 
247 1 5 | 2.1 | 1.21 
3.4 .87 
78 
15 
23.8 
20 
V 
7 ork: 62 min. 104 cals. 2,333 c.c. 
10 min. 
255 
50 
24.4 
310 
68 
28.1 
1.49 
27.4 
0.82 
94 
31 
49.2 
31 min. 
221 
16 
7.8 
238 
-4 
-1.7 
1.18 
.9 
.93 
92 
29 
46.0 
is 
Mar. 28 
205 
242 
1.17 
.85 
63 
20 
' Work: '62 min. 107 cals.' 1,861 c.cY 
11 min. 
209 
4 
2.0 
298 
56 1 23.1 1 1.40 1 19.7 
0.71 
69 
6 
9.5 
24 
35 min. 
201 
-4 
-2.0 
262 
20 8.3 1.25 6.8 
.77 
63 
20 
57 min. 
209 
4 
2.0 
261 
19 7.9 1.25 6.8 
.80 
63 
22 
i 
?ork: 53 min. 96 cals. 1,909 c.c. 
8 min. 
241 
36 
17.6 
323 
81 
33.5 
1.52 
29.9 
0.75 
83 
20 
31.7 
28 
27 min. 
223 
18 
8.8 
313 
71 
29.3 
1.47 
25.6 
.72 
79 
16 
25.4 
24 
1 The resting value used in the comparisons for Mar. 19, 25, 27 and 28 is a general average of results obtained 
with this subject while lying on the couch before work in respiration experiments without food. (See 
table 91.) The same resting value was used in the second comparison on each of these days. 
Unfortunately for the oxygen measurements, which really are the best 
indices of the total metabolism, in relatively few experiments could a resting 
period be started inside of 10 minutes after the work ceased. Frequently the 
subject ended the experimental period covered with perspiration, especially 
after severe muscular work, and it was necessary for him to " rub himself 
down" before lying upon the couch. There was also a delay in beginning the 
rest period after work, since it was always considered advisable to have the 
mouthpiece in position for several minutes before throwing the valve; accord- 
ingly, actual experimenting could not begin much inside of 10 minutes. This 
delay is greatly to be regretted, as the values for the oxygen consumption per 
minute are in general very much higher for the first 10 minutes than subse- 
quently, indicating a sharp gradient in the oxygen consumption beginning 
immediately with the cessation of work and falling off as time passes. The 
results given in table 136 show, both for the oxygen consumption and for the 
calories as computed indirectly, a persistent increase in metabolism following 
severe muscular activity. Owing to a change in the character of the katab- 
olism, the carbon-dioxide output does not show corresponding increases. 
