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Dehydration affects exercise-induced asthma and anaphylaxis.

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Dehydration during endurance exercise worsens allergy symptoms and exercise-induced asthma by impairing bodily functions and increasing airway constriction. This study highlights the critical link between hydration status and allergic responses during physical exertion.

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Area of Science:

  • Exercise Physiology
  • Immunology
  • Allergy Research

Background:

  • Allergies can be triggered by various factors including dehydration.
  • Limited research exists on dehydration's specific impact on asthma and anaphylaxis.
  • Endurance exercise presents a unique scenario for studying these effects.

Purpose of the Study:

  • To analyze the effects of dehydration on allergy responses.
  • To investigate dehydration's impact on exercise-induced asthma during endurance exercise.

Main Methods:

  • A comprehensive literature search was conducted on PubMed (April-July 2019).
  • Search terms included "dehydration," "exercise," and "allergy responses."
  • Eighteen relevant studies were analyzed for connections between exercise, dehydration, and allergic responses.

Main Results:

  • Dehydration impairs cardiovascular function (stroke volume, cardiac output) and skin blood flow, increasing core temperature and heart rate.
  • Exercise-induced dehydration reduces airway hydration, amplifying bronchoconstriction in individuals with exercise-induced asthma.
  • Endurance exercise leads to gut damage, increased intestinal permeability, and immune profile changes favoring antibody-mediated immunity and IgE production, activating mast cells.

Conclusions:

  • Dehydration exacerbates allergy symptoms and exercise-induced asthma through physiological impairments and immune system activation.
  • Maintaining hydration is crucial for individuals with allergies and asthma, especially during endurance activities.
  • Further research is needed to fully elucidate the complex interplay between dehydration, exercise, and allergic conditions.