110 



METABOLISM DURING WALKING. 



greater familiarity with the experimental technique resulted in a more 

 nearly uniform pulse-rate, but evidently these factors did not prevent 

 a stimulated pulse-rate on the first experimental day. 



During the time of this study most of these men had also served as 

 subjects in other respiration experiments in the Nutrition Laboratory. 

 In these cases the men were lying quietly, and we thus have evidence 

 as to the pulse-rates of the individual subjects under such conditions 

 The average results for four men with whom the pulse-rate was 

 counted with a stethoscope have been averaged and are given in 

 table 26, in which they are compared with the average pulse-rates 



TABLE 26. Comparison of the average pulse-rates of four subjects for the lying and standing 



positions. (Values per minute.) 



'Benedict, Miles, Roth, and Smith, Carnegie Inst. Wash. Pub. No. 280, 1919, table 93, p. 413. 



obtained photographically for the same subjects in the standing posi- 

 tion. The number of experimental periods in which records of the 

 pulse-rate were obtained ranged for the lying position from 10 periods 

 with E. D. B. to 128 periods with W. K., and for the standing position 

 from 5 periods with T. H. H. to 105 periods with E. D. B. 



The pulse-rate for the lying position is considerably higher for 

 H. R. R. than for the others, confirming our impression of him as of a 

 nervous temperament, and accounting in some degree for the high 

 pulse-rate found for the standing position. With so high a pulse-rate 

 for the basal value, the percentage increase for the standing position 

 with H. R. R. is below the average, being 27 per cent. The reverse is 

 true with T. H. H. In his case the influence of novelty in the standing 

 experiment resulted in a pulse-rate of 96, which is probably abnormally 

 high. This is the average of two days' records with five experimental 

 periods, the pulse-rate on the first day averaging 100 and on the second 





