Influence Upon Pulse-Rate Of Work On Bicycle Ergometer. Part 3

Description

This section is from the book "Human Vitality And Efficiency Under Prolonged Restricted Diet", by Francis G.BENEDICT, Walter R. Miles, Paul Roth, And H. Monmouth Smith. Also available from Amazon: Human Vitality and Efficiency Under Prolonged Restricted Diet.

Influence Upon Pulse-Rate Of Work On Bicycle Ergometer. Part 3

Pembrey comments further on the reaction to a definite amount of work, which makes of interest an examination of the percentage increase in the pulse of our subjects after the work of riding. It will be remembered that these men were all given a definite amount of work on the bicycle ergometer. We have reproduced in table 106 the values for Squad A for the pulse-rate before work and the first minute after work as found by Professor Johnson, and have added to this the percentage increase in pulse-rate above the basal value obtained with the subject in the lying position before work. Although values for the normal diet period are missing, we have values for February 8 to 18, inclusive, which represent those obtained after the resumption of full diet. Certain of the increments due to work have already been pointed out in the discussion of the data in table 104. In table 106, however, the absolute values for the pulse-rate before and after the riding are given for the whole series of observations, as well as the increases expressed in percentages. Bearing in mind that the amount of work was invariably the same, it can be seen that with approximately constant conditions the percentage increase in pulse-rate as a result of this amount of work varied considerably in the period from October 19 to January 31. With Bro it ranged from 44 to 98 per cent, with Can from 40 to 96 per cent, and with Kon from 69 to as high as 161 per cent. Maximum increments similar to those of Kon are found with Gar of 150, Moy of 183, Pea of 153, Pec and Tom of 124, and Vea of 141. Perhaps the greatest difference in increments is that noted with Moy, which ranged from 68 to 183 during the low-diet period. There is a general tendency for the larger percentage increases to be observed from November 5 on to the end of the diet period, although this is not invariably the case. With the resumption of diet there is in every case a distinct lowering of the percentage increase due to the work.

An examination of the values for the pulse-rates the first minute after the work shows that during the month of February these are generally somewhat higher than at any other time of the period. Simultaneously there is a very great increase in the basal pulse which more than offsets the increase in the pulse after work, thus lowering the percentage of increase. If we are to interpret Professor Pembrey's conception literally, this "wider range in response to muscular work" noted here would indicate that the lowered diet was distinctly advantageous. It is apparent that on the low diet the response of the heart to the same amount of work is much greater on the basis of percentage of normal than on the full diet.1 l The greater percentage increase is in large part due to the lower basal values. The actual increase in number of heart beats, as noted during the first minute after work ceased, i. e., an increase based upon values presumably not far from those actually obtaining during work, remains for each subject reasonably constant.

Table 106. - Pulse-Rate And Percentage Increase In Pulse-Rate Following Work On Bicycle Ergometer - Squad A, Subjects In Lying Position, With Food

Date.	Bro.			Can.			Kon.			Gar.			Gul.			Mon.
Date.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.
1917.
Reduced diet:
Oct. 19.......	64	96	50	68	108	59	..	..	..	52	124	138	68	120	76	64	112	75
22.......	64	92	44	52	96	85	..	..	.	56	116	107	62	120	94	68	108	59
26.......	60	100	67	68	116	71	..	....	.	52	92	77	68	112	65	68	120	76
29.......	58	92	59	51	100	96	56	101	80	44	97	120	58	100	72	64	116	81
Nov. 2.......	..	...	...	48	84	75				40	95	138	57	101	77	65	101	55
5... 5	..	...	..	53	74	40	64	108	69	48	107	123	51	90	76	58	105	81
9.......	56	103	84	50	73	46	41	107	161	45	104	131	47	93	98	53	112	111
12.......	58	104	79	48	76	58	42	92	119	39	90	131	43	88	105	51	99	94
16.......	60	119	98	..	...	..	36	85	136	38	95	150	44	85	93	49	96	96
19.......	45	85	89	49	85	73	..	...	..	50	95	90	53	92	74	65	107	65
23........	53	93	75	45	81	80	37	76	105	53	103	94	42	84	100	57	101	77
26.......	56	81	45	46	81	76	36	76	111	.	..	..	45	95	111	58	103	78
Dec. 3........	51	90	76	53	85	60				...	...	..	...	..	...	64	114	78
7........	62	101	63	53	84	58	42	97	131	42	92	119	53	85	60	56	109	95
10.......	63	114	81	60	89	48	49	107	118	49	93	90	53	95	79	74	126	70
14.......	58	104	79							47	100	113	52	85	63	69	122	77
17.......	62	108	74	50	79	58	45	100	122	49	99	102	53	100	89	63	112	78
1918.
Jan. 7.......	..	.	..	..	..	..	..	..	..	57	124	118	..	..	.	...	..	..
11.......	58	93	60	54	93	72	..	..	..	53	112	111	58	99	71	60	96	60
14.......	..	..	...	53	85	60	54	100	85	49	100	104	53	101	91	66	97	47
18.......	58	84	45	46	89	93	46	101	120	.	..	..	52	112	115	62	109	76
21.......	51	77	51	42	80	90	42	93	121	45	92	104	49	99	102	56	103	84
28.......	49	86	76	49	73	49	..			42	88	110	44	92	109	54	100	85
31.......	48	84	75	46	81	76	45	86	91	58	112	93	46	93	102	57	93	63
Unrestricted diet:
Feb. 8.......	81	120	48	62	109	76	82	122	49	66	128	94	80	132	65	82	132	61
11.......	76	120	58	74	120	62	.	....	..	71	126	77	78	124	59	88	128	45
15.......	76	112	47	..	..	.	..	.	..	70	126	80	72	124	72	85	128	51
18.......	73	105	44	66	108	64	..	.	...	66	116	76	80	136	70	80	122	53

Date.	Moy.			Pea.			Pec.			Spe.			Tom.			Vea.
Date.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage increase.	1 minute before work.	1 minute after work.	Percentage in-- crease.
1917.
Reduced diet:
Oct. 19.......	62	120	94	48	84	75	80	128	60	60	108	80	72	108	50	60	100	67
22.......	60	108	80	42	84	100	52	100	92	60	104	73	64	132	106	64	100	56
26.......	62	116	87	48	100	108	52	88	69	72	112	56	68	128	88	64	108	69
29.......	48	100	108	42	81	93	47	84	79	52	100	92	70	124	77	69	104	51
Nov. 2...	70	128	83	41	82	100	40	73	83	61	99	62	61	118	93	66	103	56
5.......	43	100	133	44	84	91	41	74	80	53	86	62	58	120	107	66	108	64
9.......	49	115	135	41	85	107	37	78	111	45	79	76	56	123	120	58	95	64
12.......	40	99	147	36	91	153	38	83	118	58	105	81	60	122	103	64	104	63
16.......	41	107	161	34	76	124	..	..	..	69	114	65	59	132	124	38	72	89
19.......	36	96	167	39	84	115	34	76	124	46	83	80	..	..	..	45	90	100
23.......	41	116	183	40	89	123	36	65	81	53	92	74	60	118	97	40	72	80
26.......	38	107	182	38	85	124	41	81	98	61	100	64	67	132	97	42	84	100
Dec. 3.......	45	101	124	42	85	102	47	77	64	56	108	93	78	144	85	50	96	92
7.......	43	112	160	36	77	114	42	81	93	53	88	66	58	109	88	35	69	97
10.......	53	120	126	42	97	131	41	80	95	58	105	81	63	122	94	41	84	105
14.......	45	108	140	40	81	103	48	92	92	...	..	..	62	128	106	36	72	100
17.......	49	116	137	42	96	129	47	81	72	..	..	...	63	116	84	37	70	89
1918.
Jan. 7...	74	124	68	48	100	108	..	..	..	..	..	..	...	.	..
11.......	44	100	127	46	96	109	46	88	91	.	...	..		....	..	56	101	80
14.......	49	111	127	56	104	86	49	88	80	..	...	..	..		.	48	85	77
18.......	46	105	128	48	99	106	53	84	58	..	..	..	...	....	..	34	65	91
21.......	39	96	146	41	86	110	42	80	90	..	..	..	..	..	..	32	60	88
28.......	42	93	121	45	81	80	45	76	69	.	.	..	..	.	.	36	65	81
31.......	57	109	91	42	96	129	42	76	81	..	..	..	.	..	..	37	89	141
Unrestricted diet:
Feb. 8.......	77	124	61	..	..	..	60	100	67	..	..	..	.	.	..	53	90	70
11.......	76	128	68	..	..	..	74	109	47	.	..	..		..	.	76	109	43
15.......	77	118	53	80	120	50	80	109	36	..	...	....	..	.	..	86	124	44
18.......	76	128	68	84	132	57	88	122	39	...	.	...	..	..	.	74	116	57

Pulse-Rate Before And After Work On Bicycle Ergometer, Squad B

Although Professor Johnson rightly laid special emphasis upon the values obtained with Squad A, those for Squad B also have a special significance, owing to the fact that they present a large number of normal values for comparison with those obtained during the short period of reduced diet. The values for Squad B are recorded in detail in table 107, in which is given for each subject the pulse before the experiment, the pulse one minute after riding, the percentage increase, and the number of minutes required for the pulse to return to normal. With two subjects, Kim and Sch, the early basal values are missing, although we have one or two post-diet values with each of these subjects. The pulse-rate prior to riding has been discussed in connection with table 85 (see page 400) and with Squad B shows the usual fall during the period of restricted diet. Since no pulse values previous to the reduction in diet were obtained with Squad A, a special significance of the results in table 107 must be the relative constancy of the basal values, i. e., the normal values obtained outside the low-diet period. When the change was made to a restricted diet, there was a characteristic decrease in pulse-rate, the significance of which has been previously discussed. Squad B shows on the resumption of unre-stricted diet increases in basal pulse prior to work similar to those exhibited by members of Squad A, although it is worth while to note that in certain instances, at least, such as with Fis on February 20 and with Ham on the same date, relatively low basal pulse values are recorded, even after three weeks of unrestricted diet.

Table 107. - Percentage Increase In Pulse-Rate And Time Required To Return To Normal After Work On Bicycle Ergometer - Squad B, Subjects In Lying Position, With Food

Date.	Fis.				Har.				How.				Ham.
Date.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage in crease.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.
1917.
Normal diet:
Oct. 24........	64	100	56	2	64	128	100	12	72	128	78	10	72	92	28	2
31.......	61	101	66	4	74	140	89	8	62	105	69	3	58	89	53	2
Nov. 7.......	60	103	72	2	65	122	88	16	60	100	67	15	60	100	67	14
14.......	60	101	68	4	70	136	94	13	66	103	56	?,	65	108	66	2
21.......	54	90	67	4	53	1?0	126	10	77	119	55	8	69	]05	52	3
Dec. 5...	..	..	..	..	67	128	91	12	70	116	66	10	63	101	60	4
12...	..	...	..	...	54	122	126	10	68	120	76	3	58	101	74	6
1918.
Reduced diet:
Jan. 9...	.	..	..	..	..	..	..	..	66	118	79	15	61	105	72	4
16.......	58	103	78	2	49	111	127	7	57	97	70	3	61	99	62	2
23..	49	99	102	3	45	122	171	201	58	108	86	2	54	95	76	2
Unrestricted diet:
Jan. 30.......	..	..	..	..	66	124	88	6	65	112	72	13	72	109	51	4
Feb. 6.......	..	..	..	..	77	128	66	7	92	132	43	7	66	104	58	7
13.......	76	118	55	5	69	124	80	8	82	128	56	15	73	108	48	3
20.......	50	93	86	8	70	126	80	6	85	132	55	9	58	101	74	4

1More than 20 minutes required for pulse-rate to return to normal.

Date.	Kim.				Lon.				Sch.				Liv.
Date.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.
1917.
Normal diet:
Oct 24	..	..	..	..	60	116	93	11	..	..	..	..	68	112	65	15
31.......	...	..	..	..	60	104	73	7	..	..	..	...	56	97	73	7
Nov. 7...	...	..	..	.	62	116	87	15	...	..	..	..	60	112	87	4
14.......	...	..	..	...	53	112	111	5	..	..	..	..	61	103	69	3
21...	....	..	....	...	58	107	84	8	...	...	..	...	62	114	84	3
Dec. 5...	..	..	..	..	63	109	73	3	..	..	..	..	62	112	81	6
12....	...	..	..	..					..	..	..	..	54	100	85	18
1918.
Reduced diet:
Jan. 2...	.	..	..	..	54	107	98	13					58	96	66	4
16.......	66	101	53	161	49	88	80	3	38	85	124	7	44	88	100	14
23...	58	101	74	12					38	67	76	ft	49	84	71	5
Unrestricted diet:
Jan 30 ......	...	..	..	..	60	120	100	18	53	99	87	3	62	132	113	4
Feb. 6.......	77	112	45	3	69	122	77	9	64	100	56	2	71	122	72	7
13.......	..	..	..	..	70	118	69	4	..	..	..	.	68	118	74	4
20.......	84	120	43	13	75	126	68	3	..	....	..	....	65	122	88	3

Date.	Sne.				Tho.				Van.				Wil.
Date.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.	1 minute before work.	1 minute after work.	Percentage increase.	Minutes to return to normal.
1917.
Normal diet:
Oct 24 ..........	68	132	94	12	60	124	107	16	64	92	44	8	64	108	69	9
31.......	68	124	82	11	58	89	53	5	58	84	45	8	65	107	65	9
Nov. 7.......	76	128	68	4	56	84	50	2	61	90	48	8	65	118	82	3
14.......	74	124	68	3	57	96	68	3	58	92	59	3	64	109	70	5
31...	.	...	..	....	59	101	71	2	62	101	63	12	57	108	89	7
Dec. 5...	72	148	106	15	56	100	79	4	58	86	48	2	69	122	77	2
12........	76	132	74	7	52	89	71	3	...	...	...	...	60	120	100	4
1918.
Reduced diet:
Jan. 9...	67	122	82	7	50	85	70	3	62	116	87	12	58	120	107	11
16.......	58	118	103	8	46	73	59	2	46	73	59	3	52	96	85	3
23.......	54	118	119	18	44	72	64	2	37	86	132	5	40	89	123	3
Unrestricted diet:
Jan. 30...	78	120	54	3	56	88	57	2	53	95	79	3	61	108	77	3
Feb. 6....	..	....	...	..	56	93	66	2	62	104	68	13	64	120	88	7
13..	..	..	..	.	54	100	85	3	76	101	33	3	69	118	71	4
20...	..	..	...	..	.	..	...	..	63	101	60	10	70	124	77	7

1Pulse-rate was 72 at the end of 16 minutes; no further records obtained.

It is, however, more particularly with, the reaction to work that we are concerned in this discussion, and the reaction of the pulse-rate to work is with this squad especially interesting as it shows what may be expected for increased pulse-rate with a constant amount of work under normal diet. Thus, during the period with normal diet, the values for Fis are fairly close to 66 per cent. With Har the values range from 88 to 126 per cent. With the other subjects the ranges are usually reasonably uniform, although Ham shows a range of from 28 to 74, and Tho an unusual range of 50 to 107. With nearly all subjects, the two or three observations during restricted diet show a distinct tendency for the percentage increase to rise.

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Influence Upon Pulse-Rate Of Work On Bicycle Ergometer. Part 3

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Influence Upon Pulse-Rate Of Work On Bicycle Ergometer. Part 3

Table 106. - Pulse-Rate And Percentage Increase In Pulse-Rate Following Work On Bicycle Ergometer - Squad A, Subjects In Lying Position, With Food

Pulse-Rate Before And After Work On Bicycle Ergometer, Squad B

Table 107. - Percentage Increase In Pulse-Rate And Time Required To Return To Normal After Work On Bicycle Ergometer - Squad B, Subjects In Lying Position, With Food

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