Clothing Test Methods, Edited by L.H. Newburgh (Physiological Tests) and Milton Harris (Physical Tests) of Subcommittee on Clothing of the National Research Council (U.S.A.) (1945) / Chapter Skim
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Metabolic Rates for Military Activities (Wulsin)
Metabolic Rates for Military Activities (Wulsin)
Pages 51-62
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From page 51... ...
Work load will be discussed in this section, and extra stress in section III. Numerous determinations of the metabolic rates connected with various civilian occupations are available.
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From page 52... ...
Obstacle course with light pack and rifle. Course lasts about 5 minutes and consists of pit jump, hurdles, log crossing, ditch jump, maze run, log step climb, ditch climb up and down, 12-foot landing net climb, high tunnel run, log ladder up and down, broken field run, low tunnel crawl, rope swing, high fence climb, one log sitting bridge, walking log bridge, and parapet ditch jump.
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From page 53... ...
Therefore, the heavier man with 44 kilograms of body weight per M2 of skin surface was unable to maintain thermal balance in the more severe experiments, whereas the lighter man, who had only J>6 kilograms of body weight per M2 of skin surface, was able to remain in thermal balance throughout. Thus total mebabolism varies directly with body weight, for activities which involve moving the whole body.
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From page 54... ...
or.gear Rest and fatigue duties Dinner Rest and fatigue duties x Light activities Boxing and Wrestling Light activities Rest and fatigue duties Supper Close order drill Calisthenics with rifle Fatigue duties Bed Totals 2nd Sample Day 1st call Reveille Calisthenics Rest and fatigue duties Breakfast Fatigue duties Road march Fatigue duties Dinner Rest and fatigue duties Road march Fatigue duties Supper Off duty in area Bed Totals Value, measured or customarily used by Harvard Fatigue Laboratory (Calories)
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From page 55... ...
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From page 56... ...
The trails were bad, with a constant succession of steep hills and gullies, and the footing was deep mud mixed with roots. The going was so arduous when climbing steep grades that men usually moved forward for 20 minutes and then rested for 10.
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From page 57... ...
The effect on food requirements of this increased caloric expenditure is easily calculated. It would be interesting to know whether the amount of sleep which is needed to maintain perfect health is increased also, and whether a quantitative relationship between total caloric output per 24 hours and hours of sleep required can be established.
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From page 58... ...
While momentary maxima in metabolism may be of no particular importance, as far as overall requirements for food and clothing are concerned, it is quite possible that the metabolic rate is increased significantly over the whole period during which a man remains exposed to danger, even though activity be light; for danger is a stimulus which keeps him intensely alert, and this presumably involves increased muscle tone and blood flow.
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From page 59... ...
Let a man ride a bicycle on a broad and safe treadmill, and again on a narrow, elevated treadmill, where he must be constantly alert to avoid falling off and receiving bruises; let the amount of mechanical work required be the same in both cases, and let metabolism and other relevant quantities be measured. Such an experiment should tell us whether the nervous strain of riding in a slightly dangerous situation increases the metabolic rate, and how much, and thus give some indication of changes in nutritional requirements which may be brought about by combat.
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From page 62... ...
That evidence must be largely drawn from the statistical tables themselves or in other words, graphs should not be substituted for statistical tables." REFERENCES (1)
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