450 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



records for but 3 of the 5 subjects at the end of 30 seconds of standing 

 after the walking ceased. These three have an average rate of 76 

 beats which is a fall of 9 beats from the preceding walking average for 

 4 subjects, and the same as the group average for the preliminary 

 standing period. This rate was not maintained and rose to 79 beats 

 at the end of 1 minute, and to 86 beats by the end of 3 minutes. At the 

 end of 9 minutes, the average rate for E.L.F., T.M.C., and H.S. was 

 82 beats, or 4 beats above the average preliminary standing rate for 

 these same subjects. The sudden rise in rate for H.S. between the 

 first and second minutes after walking ceased and an almost equally 

 sudden fall at the eighth minute are to be noted, although no cause can 

 be assigned for these changes. The increase in rate for H. W. F. at 

 the end of the second minute may be accounted for by the fact that 

 two members of the staff were discussing a point of the experiment 

 within his hearing. 



From the records of the final sitting pulse it is seen that with neither 

 H.M.S. nor T.M.C. did the rate return to the normal sitting pulse, 

 although observations were continued with H.M.S. for 12 minutes. 

 These two men were older than the other normal subjects, and the 

 subjects in Squads A and B, with the exception of Pec. The pulse- 

 rates of the other three subjects were below the preliminary sitting 

 pulse at the end of 30 seconds and the average varied but slightly 

 during the subsequent observations. The average sitting pulse for the 

 group had dropped 15 beats from the standing rate by the end of 30 

 seconds of sitting or 1 beat below the preliminary sitting rate, and this 

 rate varied but 2 or 3 beats during the succeeding 8 minutes. In this 

 respect the 5 normals did not show such deviation from the preliminary 

 sitting rate as did the other groups. It is to be recalled, however, that 

 the pulse-rates of Squads A and B taken after walking were in all cases 

 radial counts after the subject had left the chamber and was sitting 

 in an adjoining room, while the normal subjects sat on a chair placed 

 on the treadmill in the chamber and the pulse was counted by the 

 deflections of the galvanometer string. 



By referring to the normal transition curves shown in figure 101,^ 

 the average pulse-rate for the first 60 seconds of walking may be very 

 closely determined; these averages are as follows: T.M.C, 98; E.L.F., 

 90; H.W.F., 81; H.M.S, 80; and H.S., 91. From table 101 it is seen 

 that the pulse-rates as determined by counting the beats during the 

 first third of the second minute, i. e., ''after 1 minute of walking" as 

 stated in the table, are T.M.C, 88; E.L.F., 87; H.W.F., 80; H.M.S., 

 80; and H.S., 90. This shows a drop between the average pulse-rate 

 for the first 60 seconds and that of the first part of the second minute 

 of 10 beats for T.M.C, 3 beats for E.L.F., 1 beat for H.W.F., for 

 H.M.S., and 1 beat for H.S. and, in connection with the curves for the 

 first minute shown in figure 101, indicates that the heart action quickly 



^ See page 436. 



