396 



EFFICIENCY OF THE ORGANISM 



done in unit time, is of much greater moment. Experimentally 

 it has been found that the total energy expenditure per revolution 

 of the pedals is constant for all speeds, but that although there is 

 naturally an increase in the amount of the total work done, the 

 effective muscular work per revolution decreases as the speed 



increases, and there is therefore a steady fall in efficiency (sec Fig. 

 73). The same result is obtained when the speed is varied, with, 

 however, approximately the same production of effective muscular 

 work in the two experiments, as shown in Table LXXIX. : 



TABLE LXXIX. 



* JJasc line complete rest, lying. 



