62 
MUSCULAR WORK 
Table 70. — Results with subject M. A.M. {without food). 
Date and time. 
Duration. 
Carbon 
dioxide 
eliminated 
per minute. 
Oxygen 
absorbed 
per 
minute. 
Respira- 
tory 
quotient. 
Aver- 
age 
pulse- 
rate. 
Average 
respira- 
tion-rate. 
Cur- 
rent. 
Revolu- 
tions per 
minute. 
Feb. 27, 1912. 
Lying: 
8h 40°> a.m.» 
9 03 a.m 
9 26 a.m 
Moderate work: 
101" 09m a.m.* 
10 48 a.m.* 
Severe work: 
11*> 16- a.m.i 
11 36 a.m.« 
11 59 a.m.' 
min. sec. 
14 50 
15 13 
15 56 
12 17 
11 38 
10 44 
10 24 
10 16 
10 18 
c.c. 
218 
202 
208 
1,224 
1,185 
1,280 
1,773 
1,722 
1,789 
c.c. 
242 
241 
235 
1,490 
1,418 
1,444 
1,828 
1,858 
1,850 
0.90 
.84 
.89 
.82 
.84 
.89 
.97 
.93 
.97 
56 
56 
56 
126 
126 
125 
146 
146 
154 
20 
20 
18 
26 
28 
28 
32 
36 
34 
amp. 
0.95 
0.95 
0.95 
1.5 
1.5 
1.5 
83.3 
81.8 
86.0 
88.2 
86.8 
88.7 
1 The subject lay down at 8 h 07™ a.m. The pulse-rate at 8 h 30™ a.m. was 56. 
2 Work was begun at 9>> 49m a . m . Between 9 h 49m a . m . an d ioh 09 m a.m. the average rate was 91 revolutions 
P e . r minute. Mouth was put to the mouthpiece 5 minutes before the first period. 
3 In the interval before this period the average rate was 76 revolutions per minute. 
* Between the second and third work-periods the average rate of work was 75 per minute. 
6 At 10 h 59 m a.m. the current was increased to 1.5 amperes. He noticed the change in the current, which was 
made very rapidly, though it was believed that he had a suspicion the change was to be made. On 
testing this subject as to whether he were really sensitive to small changes in resistance, it was found 
that he could easily tell when the resistance was at 1.5 amperes. It was immaterial whether the 
test were made starting from below at 0.25 ampere, or coming down from 3.0 amperes, as in each case 
the subject stated almost exactly when the 1.5 amperes was reached. Between 10 h 59 m a.m. and ll h 
16 m a.m. the subject rode at the average rate of 74 revolutions per minute. He perspired quite freely 
during the period, though the work was easily done. Once during the period he lost his toe-clip. 
« The average speed in the interval before this period was 74 revolutions per minute. During.the period the 
work was done without any difficulty. 
7 The average speed in the interval before this period was about 57 (?) per minute. During the period work 
was done easily, but the subject's breathing was rather labored. He did not feel exhausted or that he 
had worked excessively hard. He thought he was "pushing" a little harder. 
Table 71. — Results with subject M. A.M. (without food). 
Date and time. 
Duration. 
Carbon 
dioxide 
eliminated 
per minute. 
Oxygen 
absorbed 
per 
minute. 
Respira- 
tory 
quotient. 
Aver- 
age 
pulse- 
rate. 
Average 
respira- 
tion-rate. 
Cur- 
rent. 
Revolu- 
tions per 
minute. 
Feb. 28, 1912. 
Light work: 
8>> 51m a.m.i 
9 15 a.m.2 
9 48 a.m.' 
Severe work: 
10 h 20" a . m .« 
10 41 a.m.' 
11 00 a.m.' 
Light work: 
ll h 23m a .m.' 
11 44 a.m. 8 
min. sec. 
15 03 
11 36 
11 23 
10 25 
10 14 
10 08 
10 14 
14 11 
c.c. 
871 
970 
999 
2,284 
2,030 
2,212 
1,056 
1,141 
c.c. 
1,070 
1,170 
1,254 
2,356 
2,101 
2,144 
1,134 
1,215 
0.82 
.83 
.80 
.97 
.97 
1.03 
.93 
.94 
100 
126 
124 
163 
160 
127 
130 
20 
24 
24 
36 
38 
30 
28 
amp. 
0.5 
0.5 
0.5 
1.5 
1.5 
1.5 
0.5 
0.5 
95.7 
102.0 
103.5 
107.5 
96.7 
99.5 
100.0 
99.1 
1 Work was begun at 8 h 22 ra a.m. without preliminary lying periods. Between 8 h 22'" a.m. and 8 h 51 m a.m. 
the subject rode at the average rate of 94 revolutions per minute. During the period the work was 
done easily and well, though it was somewhat difficult to keep him up to the 100 mark, the standard 
speed for the day. 
2 In the interval between the first two periods the subject rode at the average rate of 110 revolutions per 
minute. 
3 Between the second and third periods the subject rode at the average rate of 92 revolutions per minute. 
Throughout the first three periods with current at 0.5 ampere there was no free perspiration. 
* At 10 h 01 m a.m. the current was increased to 1.5 amperes. From 10 h 01 m a.m. to 10" 20 m a.m. the subject 
rode at the average rate of 91 revolutions per minute. During the period he found the work very 
hard and almost gave up at about the end of seven minutes. He loosed tired, but otherwise wa3 all 
right. He thought a mistake had been made with the current. 
5 In the interval before this period the average speed was 78 revolutions per minute. During the period the 
work was done with great difficulty and the speed fell off steadily toward the end. The work became 
very labored. 
6 In the interval before this period the average speed was 84 revolutions per minute. At the end of the fourth 
minute of the period he looked very tired. His breathing became more labored. He was completely 
exhausted at the end of the period and admitted that he had reached his limit. 
^ At 1 l h 1 1 m a.m. the current was lowered to 0.5 ampere. From the end of the preceding period to 1 l h 23 m a.m. 
the subject rode at the average rate of about 70 revolutions per minute. During the period the work 
was very easily done. The subject had a good color. The speed began to fall off just at the close. The 
subject said he was very tired and that his arms and wrists were sore from holding the handle bars. 
8 In the interval before this period the average speed was 86 revolutions per minute. The subject complained 
that his wrists, hands, and arms were very sore and stiff. During the period his feet slipped from the 
pedals several times. (He was not using toe-clips.) When he stopped pedaling at the end, his legs 
showed a good deal of tremor. 
