Her daily food requirements would probably be approximately 2,235 calories. This estimate would be increased, if she were obliged to do much heavy lifting, scrubbing of beds, or other duties requiring the expenditure of much effort. It would be decreased if the hours spent in study and class room work were increased and the hours on the ward shortened. The estimation may be made as follows, Sleeping 8 hrs. 110 x 0.42 x 8 = 370 calories Sitting at meals 2 hrs. 110 x 0.65 x 2 = 143 calories Sitting in class 1 hr. 110 x 0.65 x 1 = 71.5 calories Studying, 2 hrs. 110 x 0.65 x 2 = 143 calories On duty 9 hrs. 110 x 1.10 x 9 = 1089 calories Off duty (walking briskly) 2 hrs. 110 x 1.90 x 2 = 418 calories --------------- Total for day 2234.5 calories This estimate may be made to suit any individual, the man in the office or the one working on the streets, the woman living at home or the one spending eight or ten hours scrubbing the floors of a great office building; it is simply a matter of adjusting the calories in the dietary to meet the requirements of body weight and muscular activity. ~Energy Requirements for Children.~--In estimating the energy needs of children, the above method is not satisfactory, since the storage of material for growth must be considered, as well as the activities of the body. The growth period includes the years from birth to the eighteenth year, after which time the food requirements of the body are made on a basis of weight and muscular activity, as in all adults. The table on the following page shows the food allowances made for healthy children; in the feeding of malnourished or underweight children, more food in proportion to age is given in order to overcome the handicap under which they are suffering. FOOD ALLOWANCES FOR HEALTHY CHILDREN[23] ==============+======================== AGE | CALORIES PER DAY --------------+------------+----------- _Years_ | _Boys_ | _Girls_ --------------+------------+----------- Under 2 | 900-1200 | 900-1200 2-3 | 1000-1300 | 980-1280 3-4 | 1100-1400 | 1060-1360 4-5 | 1200-1500 | 1140-1440 5-6 | 1300-1600 | 1220-1520 6-7 | 1400-1700 | 1300-1600 7-8 | 1500-1800 | 1380-1680 8-9 | 1600-1900 | 1460-1760 9-10 | 1700-2000 | 1550-1850 10-11 | 1900-2200 | 1650-1950 11-12 | 2100-2400 | 1750-2050 12-13 | 2300-2700 | 1850-2150 13-14 | 2500-2900 | 1950-2250 14-15 | 2600-3100 | 2050-2350 15-16 | 2700-3300 | 2150-2450 16-17 | 2700-3400 | 2250-2500 ==============+============+=========== CALORIES PER POUND OF BODY WEIGHT PER DAY.[24]