Summary
Two types of cold exposures were carried out in humans. A. Fourteen subjects were exposed 4–7 times within 2 weeks to the following conditions: ambient temperature was decreased from 28° C to between plus and minus 5°C; the subjects wore a bathing suit and remained in a resting position during the exposure which lasted for 1 h.
B. Nine conscripts were studied before and after a 10-day exercise, during which they were exposed to moderately cold conditions during day and night. The exercise did not require increased physical activity.
In two thirds of the subjects A, metabolic reactions and shivering threshold were shifted to a lower weighted mean body temperature as well as a lower esophageal temperature (“hypothermic” type of adaptation). This modification in the thermoregulatory system was linked with a reduction in thermal discomfort and cold sensation. No change was found in the resting metabolic rate nor was there any indication of the development of non-shivering thermogenesis. Similar modifications were found in 4 of the 9, soldiers (study B). These 4, however, had particularly high shivering thresholds before the 10-day exercise and the values found thereafter were no lower than those found in the remaining five and in the subjects of group A before the cold-exposure regimen.
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References
Baum, E.: Adaptative Modifikationen des thermoregulatorischen Systems in Verlauf wiederholter Kältebelastungen des Menschen sowie bei Langstreckenläufern und Schwimmern. Inaug.-Diss., Gießen 1976
Baum, E., Brück, K., Schwennicke, H. P.: Adaptive modifications in the thermoregulatory system in long-distance runners. J. appl. Physiol. (in press, 1976)
Brück, K.: Non-shivering thermogenesis and brown adipose tissue in relation to age, and their integration in the thermoregulatory system. In: Brown adipose tissue (O. Lindberg, ed.). New York: Amer. Elsevier Publ. Comp. Inc. 1970
Brück, K.: Cold adaptation in man: Shift of shivering threshold temperatures in the course of repeated whole-body cold-exposure. Pflügers Arch.335, R 51 (1972)
Brück, K.: Cold adaptation in man. In: Regulation of depressed metabolism and thermogenesis (L. Janský and X. J. Musacchia, eds.). Springfield, Ill.: Ch. C. Thomas 1976
Brück, K.: Temperature regulation and catecholamines. Israel J. Med. (in press, 1976)
Brück, K., Schwennicke, H. P.: Interaction of superficial and hypothalamic thermosensitive structures in the control of nonshivering thermogenesis. Int. J. Biometerol.15, 156–161 (1971)
Brück, K., Wünnenberg, W.: Die Steuerung des Kältezitters beim Meerschweinchen. Pflügers Arch. ges. Physiol.293, 215–225 (1967)
Brück, K., Wünnenberg, W.: Eine kälteadaptative Modifikation: Senkung der Schwellentemperaturen für Kältezittern. Pflügers Arch. ges. Physiol.293, 226–235 (1967)
Brück, K., Wünnenberg, W.: Meshed control of two effector systems: Non-shivering and shivering thermogenesis. In: Physiological and behavioral temperature regulation (J. D. Hardy, A. P. Gagge and J. A. J. Stolwijk, eds.), pp. 562–580. Springfield, Ill.: Ch. C. Thomas 1970
Brück, K., Wünnenberg, W., Gallmeier, H., Ziehm, B.: Shift of threshold temperature for shivering and heat polypnea as a mode of thermal adaptation. Pflügers Arch.321, 159–172 (1970)
Davis, T. R. A.: Chamber cold acclimatization in man. J. appl. Physiol.16, 1011–1015 (1961)
Fanger, P. O.: The influence of age, sex, adaptation, season and circadian rhythm on thermal comfort criteria for man. Annexe 1973–2 au Bulletin de l'Institut Int. du Froid. Proc. of Meeting of IIR, Vienna, 1973
Hammel, H. T.: Terrestrial animals in cold: recent studies of primitive man, Handbook of physiology, sect. 4, pp. 413–434: Adaptation to the environment. Washington, D. C.: Am. Physiol. Soc. 1964
Heberling, E. J., Adams, Th.: Relation of changing levels of physical fitness to human cold acclimatization. J. appl. Physiol.16, 226–230 (1961)
Heldmaier, G.: Cold adaptation by short daily cold exposures in the young pig. J. appl. Physiol.36, 163–168 (1974)
Hensel, H., Brück, K., Raths, P.: Homeothermic organisms. In: Temperature and life (H. Precht, J. Christophersen, H. Hensel and W. Larcher, eds.). Berlin-Heidelberg-New York: Springer 1973
Hildebrandt, G.: The time factor in adaptation. Biometeorology II: Proc. Int. Biometeorol. Congress, Oxford-London: Pergamon Press 1966
Hong, S. K.: Comparison of diving and nondiving women of Korea. Fed. Proc.22, 831–833 (1963)
Hong, S. K.: Pattern of cold adaptation in women divers of Korea (ama). Fed. Proc.32, 1614–1621 (1973)
Keatinge, W. R.: The effect of repeated daily exposure to cold and improved physical fitness on the metabolic and vascular response to cold air. J. Physiol. (Lond.)157, 209–220 (1961)
Lange Andersen, K.: Metabolic and circulatory aspects of tolerance to cold as affected by physical training. Fed. Proc.25, 1351–1356 (1966)
LeBlanc, J.: Evidence and meaning of acclimatization to cold in man. J. appl. Physiol.9, 395–398 (1956)
Mitchell, D., Wyndham, C. H.: Comparison of weighting formulas for calculating mean skin temperature. J. appl. Physiol.26, 616–622 (1969)
Nadel, E. R., Bullard, R. W., Stolwijk, J. A. J.: Importance of skin temperature in the regulation of sweating. J. appl. Physiol.31, 80–87 (1971)
Nadel, E. R., Pandolf, K. B., Roberts, M. F., Stolwijk, J. A. J.: Mechanisms of thermal acclimation to exercise and heat. J. appl. Physiol.37, 515–520 (1974)
Ramanathan, N. L.: A new weighting system for mean surface temperature of the human body. J. appl. Physiol.19, 531–533, (1964)
Scholander, P. F., Hammel, H. T., Lange Andersen, K., Løyning, Y.: Metabolic acclimation to cold in man. J. appl. Physiol.12, 1–8 (1958)
Slee, J.: Habituation and acclimatization of sheep to cold following exposures of varying length and severity. J. Physiol. (Lond.)227, 51–70 (1972)
Stevens, J. C., Marks, L. E., Gagge, A. Ph.: The quantitative assessment of thermal discomfort. Environm. Res.2, 149–165 (1969)
Stolwijk, J. A. J., Hardy, J. D.: Temperature regulation in man. —A theoretical study. Pflügers Arch. ges. Physiol.291, 129–162 (1966)
Wyndham, C. H.: The physiology of exercise under heat stress. Ann. Rev. Physiol.35, 193–220 (1973)
Wyndham, C. H., Morrison, J. F.: Adjustment to cold of bushmen in the Kalahari Desert. J. appl. Physiol.13, 219–225 (1958)
Zeisberger, E., Brück, K.: Alteration of shivering threshold in cold- and warm-adapted guinea pigs following intrahypothalamic injections of noradrenaline and of an adrenergic alpha-recepter blocking agent. Pflügers Arch. (in press, 1976)
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This study was supported by the Deutsche Forschungsgemeinschaft (SFB 122, Project B1).
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Brück, K., Baum, E. & Schwennicke, H.P. Cold-adaptive modifications in man induced by repeated short-term cold-exposures and during a 10-day and-night cold-exposure. Pflugers Arch. 363, 125–133 (1976). https://doi.org/10.1007/BF01062280
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DOI: https://doi.org/10.1007/BF01062280