FOOD MATERIALS 



1033 



per kilogram (2.2 pounds) of body weight. Young to middle-aged men 

 and women are said to require: 



Per kg. 



At complete rest (i. e., for life processes only) 30-35 calories 



With light exercise 35-40 " 



With moderate exercise 40-45 " 



With hard muscular labor 45-60 " 



Translated into terms of calories per pound of body weight, these figures 

 become : 



Per pound 

 body weight . 



At complete rest 13 . 6-16 calories 



With light exercise 16.0-18 " 



With moderate exercise 18.0-20 " 



With hard muscular labor 20.0-27 



These figures mean that if your body weighs 154 pounds, and you are 

 doing light exercise, you need 16 X 154 = 2464 calories, to 18 X 154 = 2772 

 calories of food per day. 



Authorities disagree as to the proportion of these calories which should 

 be yielded by protein. The high protein advocate considers the ration 



"balanced" when 1 calorie out of 6 calories is obtained from protein; the 

 medium protein advocate, 1 out of 9 or 10; and the low protein advocate, 

 1 out of 12 or more. 



Suppose you eat during twenty-four hours the kinds and quantities 

 of foods indicated in Table III. The fuel value of these food materiai- 

 (computed from Table II) is given in column 2, and the fuel value of the 



