Alexander Haig
Published: 2013-09
Total Pages: 30
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ... CHAPTER IV. Values Of Foods In Albumen And Urea. QuanTities Bequired. Diet Of Training And Athletics. In considering the values of foods and the quantities required, and in apportioning these into special diets, it will be convenient to treat of diets according as they are required for ordinary conditions of life, for special training and exercise, or for the treatment of slight departures from normal health, such as obesity and some minor alterations of function. We have already seen in chapter i. that the body weight in pounds, multiplied by 9, gives the minimum amount of albumens required for a sedentary life, and by 10 or ]0'5 those required for an active life, such as that of an out-door labourer. And if we take an active man of 140 lbs., and apply these rules, we find that he will require 1,400 grains of albumen per day, which will produce about 466 grains of urea per day when completely digested and metabolised. With regard to urea, I may say that the percentages of albumen values, to be given in the diet tables that follow, have been found by me from practical trial to be very close to the truth; for though on a weighed diet, continued from day to day, urea will be one day below and another above the quantity calculated from the albumen values of those foods; when taken over days or weeks, these fluctuations tend to balance each other, and over such a period the urea calculated from the albumens generally comes very close indeed to the urea found. These fluctuations no doubt arise from variations in the time of digestion of the foods used, as the digestion and absorption of a food taken one day is not necessarily concluded in time for the twentyfour hours' division of the urine; and then, again, when albumens have been absorbed, ..