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Related Experiment Videos

Heavy exercise, nutrition and immune function: is there a connection?

R J Shephard1, P N Shek

  • 1Dept. of Clinical Biochemistry, University of Toronto, Ontario.

International Journal of Sports Medicine
|November 1, 1995
PubMed
Summary

Exercise and nutrition interact to affect immune function. While athletes may alter diets or deplete reserves, immune resistance typically remains strong, except in extreme cases like overtraining.

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Area of Science:

  • Sports Medicine
  • Nutrition Science
  • Immunology

Background:

  • Exercise influences the interplay between nutrition and immune function.
  • Athletes and fitness enthusiasts may adopt specific dietary practices.
  • Nutritional status can impact immune responses during physical activity.

Purpose of the Study:

  • To explore how exercise affects the relationship between nutritional status and immune function.
  • To identify potential mechanisms through which diet and exercise interact to influence immunity.
  • To assess the impact of nutritional changes on infection resistance in athletes.

Main Methods:

  • Review of existing literature on exercise, nutrition, and immune function.
  • Analysis of dietary patterns in athletes, including supplementation and energy balance.

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  • Examination of physiological changes during prolonged exercise, such as glycogen depletion and antioxidant status.

    • Main Results:

    • Exercise can alter nutritional status through dietary choices and energy expenditure.
    • Mechanisms include altered nutrient intake, competition for amino acids, and antioxidant demands.
    • Most nutritional changes associated with exercise are temporary and do not significantly reduce infection resistance.
    • Exceptions include ultra-endurance events, overtraining, and severe calorie restriction.

    Conclusions:

    • Exercise and nutrition have complex interactions affecting immune function.
    • While potential disturbances exist, immune resistance is generally maintained in most exercise scenarios.
    • Extreme exercise or dietary practices may pose risks to immune function and infection resistance.