72 



ENERGY TRANSFORMATIONS DURING HORIZONTAL WALKING. 



the subject standing almost invariably preceded the periods when the 

 subject walked on the treadmill, but with subject II only one standing 

 period preceded the walking periods. With subject II, therefore, 

 instead of using the daily values found for the standing position, we have 

 employed the average value found for the whole series of experiments, 

 i. e., 1.25 calories per minute. Special use will be made of the values 

 found while the subject stood swinging his arms. 



INFLUENCE OF FOOD UPON METABOLISM IN THE STANDING POSITION. 



The experiments in which the subject was studied after the ingestion 

 of food varied not only in the character of the food taken, but in the 

 amount of food, the influence of both a light and a heavy meal being 

 observed. 



INFLUENCE OF A LIGHT MEAL. 



As we have seen from the data given in the historical summary table 

 (table 1), it has been the custom of several investigators to make 

 walking experiments after the subject had taken a moderate amount of 

 food. We felt it important, therefore, to make observations under 

 these conditions, since they would give information as to how long the 



TABLE 1 1 . Metabolism of subject II standing in different positions after a light meal. 



[Values per minute.] 



ingestion of food influences metabolism when accompanied by muscular 

 activity. With subject II the first meal of the day was usually a mod- 

 erately light meal; accordingly on certain days he was permitted to 

 eat breakfast before coming to the Laboratory for the experiments. 



The results of the standing experiments after the morning meal are 

 given in table 11. When the subject was standing in a relaxed posi- 



