PHYSICAL ACTIVITY AND ENDURANCE. 663 



With gymnasium work in general I noticed particularly weakness in the 

 wrists, ankles, and in the other joints under conditions of suspension." May 

 22: Recalled his feelings of weakness in the knees, ankles, and wrists asso- 

 ciated with the experiment. Spoke of the pleasure he experienced at being 

 able to run up all the stairs to the respiration laboratory in the dormitory 

 before the Christmas vacation without the subjective sensation of weakness. 

 "One can run upstairs on his nerve even though he has the weaknes.'S, but 

 there were times, I believe, when I could not possibly run up more than one 

 flight of steps." The subject differentiated sharply between those periods 

 in the experiment when the weight was actively reduced, as in October, 

 November, and January, and the long period of weight maintenance in Decem- 

 ber. "During the period of reduction, one is physically uncomfortable, 

 ineffective, and hungry all the time." In his own case he frequently had to 

 go to bed early in the evening to forget his unpleasant feelings. "Concerning 

 the cross-country races, I was beaten in the two intercollegiate events, once 

 by a Wesleyan man whom I beat last year. In both races the representative 

 from the other team and myself led the race. We ran well together until we 

 came near the end. As we left the swamp about a quarter of a mile from the 

 finish and started up the long grade, the other fellow simply went away from 

 me in spite of all that I could do. I seemed to have plenty of endurance, but 

 I could not sprint as normally for the finish. Following the race I was in 

 much better physical condition than the other runners. They were exhausted 

 and nearly at the point of physical collapse, while I felt fine and could have 

 run again. In reference to the gymnasium work, as I have stated, I always 

 noticed the lack of strength in my wrists and arms to do the apparatus work." 



Pec. — November 10: Notices a loss of "pep" and staying power (endur- 

 ance) ; all right after he once gets started; notices weakness in climbing stairs. 

 Had to work hard to reduce and thought this made him weak. January 12: 

 "Feel stronger and more comfortable than before Christmas. I am playing 

 hockey as goal tender now." January 26: " During last few days I ran down 

 in vitahty but not in weight." February 2: "I have felt rather better than 

 usual physically during the week; continually improving since early days of 

 experiment." February 8 : Hockey game was lost by a heavy score. Thought 

 to have been due to the subject's weakened physical condition. 



Spe. — November 10: Feels weak tonight, particularly in going upstairs. 

 When he rises suddenly, everything turns black. After work in the afternoon, 

 if he walks up three flights of stairs to respiration laboratory he is more tired 

 than usual. He has as much " pep " as before diet. November 24: Has not 

 the endurance for physical work that he formerly had. A swim of two full 

 lengths of the pool makes him tired; not so usually. Weakness in the legs 

 is conspicupus. May 22: "I think it is quite logical for a man to say that he 

 is weak in the knees, and later be seen to run up and down stairs. I remember 

 clearly that I used the stair rail more when going up and down stairs and bore 

 part of my weight with the hands. In the fall term I did practically as well 

 as usual in class football team practice against the university team as I would 

 have done under normal conditions. I think, however, that in the winter 

 term my athletic work was not up to standard." 



Tom. — November 10: "Was up late last night and had only 4 hours' sleep. 

 Tearing around Boston this afternoon and am sleepy now, but otherwise I 

 feel good." November 24: "I feel fine, but cannot get thinner. I have not 

 the time to work off flesh the way the other fellows do." December 19: 

 "Feelings of weakness are not prominent in my case." January 26: "I am 



