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Immune dysfunction as a factor in heat illness.

R J Shephard1, P N Shek

  • 1Biomedical Sciences Section, Defence and Civil Institute of Environmental Medicine, Toronto, Ontario, Canada.

Critical Reviews in Immunology
|October 26, 1999
PubMed
Summary
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Stress and immune function are linked, especially during exercise in heat. This study explores how immune changes from heat exposure and exercise may impact heat illness severity and outcomes.

Area of Science:

  • Physiology
  • Immunology
  • Environmental Medicine

Background:

  • The relationship between stress and immune function is established.
  • Exercise in hot environments presents unique physiological challenges.
  • Heat illness and fatalities are significant concerns in extreme conditions.

Purpose of the Study:

  • To review the features of heat illness.
  • To summarize immune responses to stress, heat exposure, and exercise.
  • To discuss the role of immune disturbances in heat illness outcomes.

Main Methods:

  • Literature review of physiological responses to heat and exercise.
  • Summary of current knowledge on stress and immune function.
  • Discussion of potential impacts on heat illness.

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Main Results:

  • Heat exposure and strenuous exercise induce physiological stress.
  • Specific immune responses are triggered by heat and exercise.
  • Little research has connected immune function changes to heat illness severity.

Conclusions:

  • Immune system alterations during heat stress and exercise warrant further investigation.
  • Understanding these immune changes may improve prevention and treatment of heat illness.
  • The impact of immune disturbances on heat illness outcomes requires more research.