152 



THE ttUMAN MOTOR 



The ration used was mixed, comprising bread, beef, milk, butter 

 and biscuits, and the drink consisted of weak coffee. 



The static expenditure, that is to say, of the man in repose, 

 only occupying himself, during 24 hours, by changing his clothes, 

 making his bed, eating, reading and writing, represents on an 

 average 32-56 Cal. per kilogramme of the weight of the body ; 

 so that, in an environment of 20C, a male adult, weighing 65 

 kilogrammes, expends statically. 



32-56 x 65 = 2,120 Calories per day. 



But the gross expenditure of work (static + dynamic) varies 

 with the weight of the subject and especially with the magnitude 

 of his work. Muscular activity therefore, which will be considered 

 later, is involved. 



104. Analysis of Energetic Expenditure. The following table 

 gives an analysis of the results obtained by the American investi- 

 gators with a subject of robust health, aged 22 years, and having 

 a mean weight of -76 kg. The temperature of the environment 

 was 20 C. and a mixed diet was given. 



It follows from this that the expenditure varies in the twenty- 

 four hours, showing a minimum between 11 p.m. and 1 a.m., 

 that being the time of deepest sleep. At that time, the expend- 

 iture is 145 Calories in two hours, which would make 1,740 



