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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
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Current Clinical Concepts: Heat Tolerance Testing.

Cody Butler1, Erin Dierickx2, Michelle Bruneau3

  • 1Special Warfare Human Performance Squadron, Lackland Air Force Base, Texas.

Journal of Athletic Training
|November 18, 2021
PubMed
Summary
This summary is machine-generated.

Heat tolerance testing (HTT) helps determine work readiness in heat by monitoring exertion thermoregulation. This review assesses HTT

Keywords:
exertional heat strokeheat intoleranceprotocol considerationsreturn to activityreturn to dutyreturn to play

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Area of Science:

  • Sports Medicine
  • Environmental Physiology
  • Occupational Health

Background:

  • Heat tolerance testing (HTT) assesses exertional thermoregulation for heat work/exercise readiness.
  • The Israeli Defense Forces protocol is widely used, but new protocols and interpretation variables are emerging.
  • Exertional heat stroke (EHS) necessitates understanding HTT's role in recovery and safe return to activity.

Approach:

  • Summarize the role of HTT post-exertional heat stroke.
  • Critically assess the scientific validity and reliability of current HTT protocols.
  • Review and synthesize best-practice recommendations for HTT performance and interpretation.
  • Incorporate the Strength of Recommendation Taxonomy (SORT) to grade evidence for recommendations.

Key Points:

  • HTT is crucial for guiding return-to-activity decisions after exertional heat illness.
  • Evidence supporting specific HTT protocols and interpretation criteria varies, necessitating critical appraisal.
  • Standardized protocols and clear interpretation guidelines are needed for reliable HTT application.
  • Future research should focus on refining HTT protocols and validating their predictive accuracy for heat illness risk.

Conclusions:

  • HTT is a valuable tool for assessing heat readiness, but its application requires careful consideration of protocol validity and interpretation.
  • Clinicians, coaches, and researchers need evidence-based guidelines to optimize HTT use and ensure athlete/worker safety.
  • Further research is warranted to enhance the scientific rigor and practical utility of HTT in diverse environmental and exertional contexts.