PHYSIOLOGICAL EFFECTS OF GRADE WALKING. 



259 





rapid increase in the respiration-rate of W. K. as the work increased 

 manifests itself here in an increase over the standing requirement per 

 100 kg. m. of work, while for E. D. B. the increase per 100 kg. m. 

 diminished as the amount of work became larger and reached con- 

 stancy at about 800 to 900 kg. m. The percentage increase over the 

 standing value for W. K. ranged from 16 to nearly 100 per cent, with 

 an increase per 100 kg. m. of 7 to 11 per cent. With E. D. B. the 

 increase was as high as 40 per cent for the first 100 kg. m., but it fell 

 rapidly and above 700 kg. m. the increase per 100 kg. m. was con- 

 stant at a level of 7 and 8 per cent. 



FIQ. 29. Pulse-rate, respiration-rate, and pulmonary ventilation of E. 

 D. B. during grade walking, referred to kilogrammeters of work. 

 (Values per minute from table 56.) 



TABLE 74. Respiration-rate of W. K. with increasing amounts of work in 

 grade-walking experiments without food. (Values per minute.) 1 



upon figure 28. 



