SUBJECTS. 47 



SUBJECTS. 



In this series of observations two subjects were used, both of whom 

 were more or less trained to severe muscular activity, as one (A. J. O.) 

 was a semi-professional baseball player and the other (M. A. M.) a 

 professional bicyclist. The preliminary observations in this research 

 were carried out by Dr. Carl Tigerstedt with the subject A. J. O. (sub- 

 ject I), a man of athletic build, who readily adapted himself to the 

 observations on the treadmill and with the respiration apparatus. He 

 was 29 years of age, 180 cm. in height, and had a body-weight with 

 clothing varying from 72.1 kilograms to 74.8 kilograms and without 

 clothing of 69.7 kilograms. Since in this study one of the prime objects 

 was to note the energy required to move 1 kilogram of material in the 

 forward direction 1 meter, i. e., 1 horizontal kilogrammeter, the body- 

 weight with clothing is of importance in each experiment. These 

 weights are given in detail in table 13 (page 78). 



The major portion of the research was devoted to a study of forward 

 progression at varying speeds with the subject M. A. M., who had 

 previously served as the subject of Cathcart in the study of the mus- 

 cular work of bicycle-riding. This subject, who in this publication is 

 designated as subject II, 1 was 31 years of age, 177 cm. in height, and 

 had a body-weight with clothing varying from 69.9 to 72.4 kilograms. 

 The average body-weight without clothing during this series of experi- 

 ments was 68.3 kilograms. The body-weight with clothing is given for 

 each experiment in tables 14 and 16 (pages 83 and 88). 



'Further data regarding the body measurements, etc., of this subject may be found in the report 

 of the previous study on muscular work. See Benedict and Cathcart, Carnegie Inst. Wash. Pub. 

 187, 1913, p. 35. 



