234 



METABOLISM DURING WALKING. 



grade. It appears from the relative positions of the curves for W. K. 

 that the total heat produced for a given amount of work is somewhat 

 higher when the work is performed at a fast rate of walking with a low 

 grade. For instance, with 400 kg. m. of work on a 15 per cent grade, 

 the total heat-output would be 5.62 calories, while with the same 



Gals., 



*A 



10.5 

 9.5 

 8.5 

 7.5 

 6.5 

 5.5 

 4.5 



3 5 

 Kg.ms. 300 500 700 ~ 1)00 



FIG. 21. Total heat-output of W. K., referred to kilo- 

 grammeters of work performed in walking on dif- 

 ferent grades. (Values per minute.) 



Cals 



15.5 



14.5 



13 



12.5 



11.5 



105 



9.5 



8.5 



7.5 



6.5 



5.5 



4.5 

 3.5 



2.5 



Kg.ms. 



200 



400 



600 



800 





A 2 5.0' 

 x 30.0 



1000 



1200 



1400 



1600 



FIG. 22. Total heat-output of E. D. B., referred to kilo- 

 grammeters of work performed in walking on dif- 

 ferent grades. (Values per minute.) 



