METABOLISM 



601 



The increase in blood sugar under the influence of exercise occurs rather sooner in 

 the diabetic organism. Typical data follow: 



Experiment. Ingest a simple uniform diet (see Experiment 41, page 625) for 

 five days taking the first meal after 12 o'clock (noon) and the last one before 10 

 P. M. On the morning of the second day (7 A. M.) determine the sugar in your 

 blood (see methods, Chapter XVI). About three hours later take a brisk walk 

 for 8 miles covering the distance in about two hours and consume 200 grams 

 sucrose during the walk. Make a second analysis of the blood sugar. On the third 

 day analyze your blood for sugar at 7 A. M. and again at noon, remaining quiet in 

 the meantime. The fourth day should be passed without physical exertion whereas 

 on the second day between 10 A. M. and 12 M. a brisk 8-mile walk is taken but no 

 sucrose ingested. Sugar analyses should be made at 7 A. M. and 12 M. each day. 



INFLUENCE OF EXERCISE ON BLOOD SUGAR (Diabetes Patient) 



Calculate your results, tabulate them and compare them with those given above. 



12. Alimentary Glycosuria. Normal urine contains a trace of glucose but not 

 enough to permit detection by the ordinary tests used in urinary analysis, if 

 more glucose is ingested than can be absorbed and assimilated by the body the 

 excess will be eliminated in the urine. The "assimilation limit" for the glucose 

 has been exceeded, and a transient alimentary glycosuria results. To demon- 

 strate this, glycosuria proceed as follows : Before breakfast or luncheon empty 

 the bladder and test the urine for sugar by any reliable test (see Chapter XXIV). 

 If the test is negative, ingest along with the other articles of diet, 250 grams of 

 glucose, sucrose, or lactose dissolved in water. Empty the bladder at the exid 

 of every hour for a period of three hours and test the urine for reducing sugar 

 and the sugar ingested. 



Was there any glycosuria and if so how soon after the sugar ingestion did it 

 appear? If no glycosuria resulted repeat the test on a subsequent day using 

 a larger quantity of sugar. If desired, the sugar in the urine may be 

 determined quantitatively by one of the methods given in Chapter XXVII. 



