6 8 10 



Years of age 



12 



AVERAGE DAILY ENERGY EXPENDITURE AT DIFFERENT AGES^ 



The high expenditure of energy per pound of body weight during the first year is 

 due to the relatively large body surface and to very rapid growth. The increased 

 energy expenditure between twelve and fifteen years of age is due to accelerated 

 growth at this time 



Average Basal Energy Metabolism of Boys and Girls in Terms of Body Weight- 



Energy Cost of Activities' By the use of the respiration calorimeter 

 the energy cost of several different activities has been worked out. These 

 figures tell us how many additional Calories an individual spends per 



^After Foundations of Nutrition by Mary Swartz Rose. By permission of The Macmillan 

 Company, publishers. 



-Adapted from Mary Swartz Rose, Foundations of Nutrition, 1938, p. 90. By permission 

 of The Macmillan Company, publishers. 



"See No. 3, p. 136. 



121 



