PHYSIOLOGICAL EFFECTS OF GRADE WALKING. 



257 



advantage. Zuntz and Schumburg 1 report that when one of their 

 subjects walked with a lame foot, the metabolism increased 9.2 per 

 cent. This might well have occurred with E. D. B. on January 10 had 

 we insisted on continuing the experiment, as his lameness caused him 

 great discomfort in walking. On January 3, 4, and 5, the lameness 

 was apparently of too little account to affect his efficiency. 



TABLE 73. Effect of slight lameness upon the metabolism and efficiency of E. D. B. (Values 



per minute.) 



PHYSIOLOGICAL EFFECTS OF GRADE WALKING. 

 RESPIRATION-RATE DURING GRADE WALKING. 



The respiration-rates during the experiments with grade walking 

 (see tables 13 to 16, pp. 69 to 78) tended to increase slightly in each 

 period as the forenoon progressed. This increase, in a few instances, 

 was as large as 5 respirations per minute, but in the majority of cases 

 it was only 1 or 2 respirations per minute over that of the first walking 

 period. The increase between periods does not appear to be associated 

 with the amount of work which the subject was performing, and the 

 differences were no greater when the larger amounts of work were done. 



The average respiration-rates are also given in table 56 (p. 221), in 

 which the experimental data have been grouped according to the grade 



: Zuntz and Schumburg, Physiologic des Marsches, Berlin, 1901, p. 265. 



