148 



METABOLISM DURING WALKING. 



Murschhauser, grouped according to like speeds. The table shows the 

 wide variations which may be found with different subjects and also 

 that no marked effect on this factor is evident below the speed of 80 

 to 90 meters per minute (approximately 3 miles an hour). These 

 average values are likewise given in the form of curves for the five 

 principal subjects. (See fig. 11.) 



TABLE 38. Average energy cost per horizontal kilogrammeter of walking on a level at different speeds. 



(Values per minute.) 



Benedict and Murschhauser, Carnegie Inst. Wash. Pub. No. 231, 1915. 



GRAM- 

 CALORIE 



FIG. 11. Average energy cost per horizontal kilogrammeter 

 of walking on a level at various distances per minute. 



From table 38 and figure 11 it is seen that an increase in speed is 

 accompanied by an increase in the cost per horizontal kilogrammeter 

 with H. R. R. and W. K., but practically no change was found for 

 T. H. H. Table 38 also shows practically no change for J. H. G. and 

 E. L. F., but with H. M. S. the cost per horizontal kilogrammeter fell. 

 The curve of E. D. B. as a whole implies that there is practically no 

 increase in the cost per horizontal kilogrammeter for medium speed, 

 but for a speed above 80 to 85 meters per minute the cost increases. 

 The group for the slowest speed, that for 35 to 40 meters per minute, 

 shows a tendency to be higher than the succeeding groups, but these 



