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The effect of environmental temperature and humidity on 24 h energy expenditure in men

Published online by Cambridge University Press:  09 March 2007

M. E. Valencia ,
G. McNeill ,
J. M. Brockway  and
J. S. Smith
M. E. Valencia
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
G. McNeill
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
J. M. Brockway
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
J. S. Smith
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
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Abstract

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The effects of environmental temperature and humidity and their interaction on 24 h energy expenditure were measured using whole-body indirect calorimetry in eight normal-weight young men who wore standardized light clothing and followed a controlled activity regimen. A randomized-block experimental design was used, with temperature effects assessed by measurements at 20, 23, 26 and 30°, while humidity was altered from ambient (50–65% relative humidity) to high (80–93% relative humidity) at 20 and 30° only. There was no significant effect of humidity on 24 h energy expenditure at the two extreme temperatures in this range, though when periods of sleep and exercise were excluded the energy expenditure at high humidity was significantly higher than that at ambient humidity (P < 0.02). The effect of temperature at ambient humidity levels showed lower values at 23 and 26° than at 20 and 30° (P < 0.02). The effect of temperature was not equally apparent in all components of the 24 h energy expenditure, as sleeping metabolic rate and the energy cost of walking and cycling showed no significant effect of temperature over this range. This raises the possibility that the effects of temperature are attributable to behavioural changes during the waking portion of the day rather than any non-shivering thermogenic mechanisms at tissue level.

Keywords

TemperatureHumidityEnergy expenditure
Type
Enviromental Effects on Energy Expenditure
Information
British Journal of Nutrition , Volume 68 , Issue 2 , September 1992 , pp. 319 - 327
Copyright
Copyright © The Nutrition Society 1992

References

REFERENCES

Blaxter, K. L. (1989). Energy Metabolism in Animals and Man. Cambridge: Cambridge University Press.Google Scholar
Blaza, S. & Garrow, J. S. (1983). Thermogenic response to temperature, exercise and food stimuli in lean and obese women, studied by 24 h direct calorimetry. British Journal of Nutrition 49, 171–180.Google ScholarPubMed
Close, W. H. & Mount, L. E. (1978). The effects of plane of nutrition and environmental temperature on the energy metabolism of the growing pig. I. Heat loss and critical temperature. British Journal of Nutrition 40, 413–421.CrossRefGoogle ScholarPubMed
Consolazio, C. F., Konishi, F., Ciccolini, R. V., Jamison, J. M., Sheehan, E. J. & Steffen, W. P. (1960). Food consumption of military personnel performing light activities in a hot desert environment. Metabolism 9, 435–442.Google Scholar
Consolazio, C. F., Shapiro, R., Masterton, J. E. & McKinzie, P. S. L. (1961). Energy requirements of men in extreme heat. Journal of Nutrition 73, 126–134.CrossRefGoogle Scholar
Dauncey, M. J. (1981). Influence of mild cold on 24 h energy expenditure, resting metabolism and diet-induced thermogenesis. British Journal of Nutrition 45, 257–267.CrossRefGoogle ScholarPubMed
Davies, R. H., Hassan, C. E. M. & Sykes, A. H. (1973). Energy utilization in the laying hen in relation to ambient temperature. Journal of Agricultural Science, Cambridge 80, 173–177.CrossRefGoogle Scholar
Durnin, J. V. G. A. & Womersley, J. (1974). Body fat assessed from total body density and its estimation from skinfold thickness. British Journal of Nutrition 32, 77–97.CrossRefGoogle ScholarPubMed
Food and Agriculture Organization/World Health Organization/United Nations University. (1985). Energy and protein requirements. Technical Report Series no. 724. Geneva: WHO.Google Scholar
Garby, L., Lammert, O. & Nielsen, E. (1986). Energy expenditure over 24 hours on low physical activity programmes in human subjects. Human Nutrition: Clinical Nutrition 40C, 141–151.Google Scholar
Garby, L., Lammert, O. & Nielsen, E. (1990). Changes in energy expenditure of light physical activity during a 10 day period at 34°C environmental temperature. European Journal of Clinical Nutrition 44, 241–244.Google Scholar
Lean, M. E. J., Murgatroyd, P. R., Rothnie, I., Reid, I. W. & Harvey, R. (1988). Metabolic and thyroidal responses to mild cold are abnormal in obese diabetic women. Clinical Endocrinology 28, 665–673.CrossRefGoogle ScholarPubMed
McLean, J. A. & Watts, P. R. (1976). Analytical refinements in animal calorimetry. Journal of Applied Physiology 55, 628–634.Google Scholar
McNeill, G., Bruce, A. C., Ralph, A. & James, W. P. T. (1988). Inter-individual differences in fasting nutrient oxidation, and the influence of diet composition. International Journal of Obesity 12, 455–463.Google ScholarPubMed
McNeill, G., McBride, A., Smith, J. S. & James, W. P. T. (1989). Energy expenditure in large and small eaters. Nutritional Research 9, 363–372.Google Scholar
Nielsen, E. (1987). Acute modest changes in relative humidity do not affect energy expenditure at rest in human subjects. Human Nutrition: Clinical Nutrition 41C, 485–488.Google Scholar
Quenouille, M. H., Boyne, A. W., Fisher, W. B. & Leitch, I. (1951). Statistical studies of recorded energy expenditure in man. Commonwealth Bureau of Animal Nutrition Technical Communication no. 17. Aberdeen.Google Scholar
Valencia, M. E., Maiorino, P. M. & Reid, B. L. (1980). Energy utilization of laying hens. II. Energetic efficiency and added tallow at 18.3°C and 35°C. Poultry Science 59, 9.Google Scholar
Warwick, P. M. & Busby, R. (1990). Influence of mild cold on 24 h energy expenditure in ‘normally’ clothed adults. British Journal of Nutrition 63, 481–488.CrossRefGoogle ScholarPubMed
Weir, J. B. de V. (1949). New methods of calculating metabolic rate, with special reference to protein metabolism. Journal of Physiology 109, 1–9.Google Scholar
Wenzel, H. G. (1978). Heat stress upon undressed man due to different combinations of elevated environmental temperature, air humidity, and metabolic heat production: a critical comparison of heat stress indices. Journal of Human Ergology 7, 185–206.Google ScholarPubMed
Wilkerson, J. E., Raven, P. B. & Horvath, S. M. (1972). Critical temperature of unacclimatised male Caucasians. Journal of Applied Physiology 33, 451–455.CrossRefGoogle Scholar