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Sports Medicine

, Volume 16, Issue 4, pp 266–289 | Cite as

Metabolic Adaptations to Exercise in the Cold

An Update
  • Roy J. Shephard
Review Article

Summary

Metabolic adaptations to exercise in a cold environment include the liberation of heat by vigorous physical activity, shivering and various forms of nonshivering thermogenesis. During a single exposure to cold the main metabolic fuel is glycogen; however, repeated bouts of exercise in the cold also result in an increase in fat metabolism.

Potential contributors to fat loss induced by exercise in the cold include: the energy cost of synthesising lean tissue; cold-induced excretion of ketones; stimulation of resting metabolism; and the high energy cost of movement in a cold environment (walking over snow, the weight of heavy boots, hobbling by winter clothing, and decreased mechanical efficiency of dehydrated muscles). Biochemical explanations of fat mobilisation include increased secretion of catecholamines, increased sensitivity of peripheral catecholamine receptors and a decrease in circulating insulin levels. Such fat loss may be helpful in treating moderate obesity, although the response seems less well developed in women than in men.

Metabolic changes must be taken into consideration in preparing winter athletes for competition. Glycogen depletion has a negative effect on the performance of endurance competitors, but this can be countered by a combination of diet, training and cold acclimation.

Keywords

Brown Adipose Tissue Cold Acclimation Cold Exposure Apply Physiology Cold Environment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Adis International Limited 1993

Authors and Affiliations

  • Roy J. Shephard
    • 1
  1. 1.School of Physical and Health Education, and Department of Preventive Medicine and Biostatistics, Faculty of MedicineUniversity of TorontoTorontoCanada

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