448 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



was but 1 beat higher than for 9 subjects at the end of 1 minute, and 

 it is in harmony with the results found with Squad B on January 6 

 and January 28. During the first 30 seconds of standing following 

 walking, the average pulse-rate fell 12 beats from the rate at 24 min- 

 utes, and varied but 1 or 2 beats during the 120 seconds of standing, 

 thus indicating the quick response of the heart to the requirements of 

 the body. This rate was practically the same as that found during 

 the preliminary standing period. In this respect. Squad A differed 

 from Squad B on January 28 when the pulse did not return to the pre- 

 liminary standing rate, at least in the time covered by the observation. 

 The pulse-rates counted after 2 minutes of sitting, i. e., 4 minutes after 

 walking ceased, show a further fall in rate of 13 beats. Taking for an 

 average the rates at the fourth and fifth minutes, we find it to be 50 

 beats, or 4 per cent below the sitting pulse at the start of the experi- 

 ment. By the end of 8 or 9 minutes of sitting, the pulse-rate had 

 recovered and the average of 11 men was 52, or the same as the original 

 sitting pulse. 



In table 101 are given the pulse-rates of 5 normal subjects referred 

 to on page 436. The pulse-rates for the sitting position, preliminary 

 to walking, are the average counts taken each minute for the 10 

 minutes during which the subject sat, except for E.L.F. and H.S., 

 whose averages are from counts made for 6 and 7 minutes, respectively, 

 of the 10 minutes of sitting. During the standing period, the average 

 in each case is from counts taken each minute for 11 minutes. It is 

 seen that the rate for H.M.S. remains very nearly uniform for the 

 entire walking period at about 9 beats above the standing rate. While 

 the data for H.W.F. are not so complete as for the others, they show a 

 smaller initial change in the rate with greater variations during the 

 period of walking. E.L.F. has a larger initial change than the others 

 and this rate is maintained throughout the walking period on the whole 

 rather uniformly. The rate of T.M.C. after the first minute shows a 

 decided drop which is then maintained approximately 5 beats above 

 the standing rate. The changes in the rate of H.S. are similar to those 

 of T.M.C. for the first third of the period but show greater variations 

 as the period progresses. The average increase in the pulse-rate from 

 sitting to standing is 8 beats or 12 per cent of the sitting rate, and the 

 increase due to walking 1 minute is 9 beats with a rate of 85 beats, or 

 12 per cent of the standing rate. During the succeeding 3 minutes, 

 there was a fall to an average rate of 81 beats at the fourth minute and 

 a subsequent increase to 85 beats by the sixth minute. The latter was 

 the rate found at the end of the first minute and was maintained prac- 

 tically unchanged during the remainder of the walking period. The 

 fall in the pulse-rate following the first minute of walking, and its sub- 

 sequent recovery by the sixth minute is in character the same as with 

 the two diet squads, though perhaps not so pronounced. There are 



