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Related Experiment Videos

Stress evaluation by the physiological strain index (PSI).

D S Moran1

  • 1Heller Institute of Medical Research, Sheba Medical Center, Tel-Hashomer, Sackler Faculty of Medicine, Tel Aviv University, Israel. dmoran@glil-yam.org.il

Journal of Basic and Clinical Physiology and Pharmacology
|March 16, 2001
PubMed
Summary

A new Physiological Strain Index (PSI), using rectal temperature and heart rate, effectively evaluates exercise and heat stress across various conditions. This validated index offers a simple, scalable tool for assessing physiological strain in humans and animals.

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Area of Science:

  • Physiology
  • Environmental Health
  • Exercise Science

Background:

  • Exercise and heat exposure pose significant physiological challenges.
  • Accurate measurement of physiological strain is crucial for safety and performance.
  • Existing methods for assessing heat stress can be complex or limited.

Purpose of the Study:

  • To review the development and validation of a Physiological Strain Index (PSI).
  • To evaluate the PSI's utility across diverse environmental and physiological conditions.
  • To explore the PSI's adaptability for human and animal research.

Main Methods:

  • Development of PSI using rectal temperature and heart rate.
  • Validation of PSI across seven databases encompassing various exercise/heat conditions.

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  • Evaluation of PSI in hypohydration, gender differences, and animal models.
  • Adjustment of PSI for interspecies application (rats).

    • Main Results:

    • PSI effectively quantifies exercise/heat stress in humans under varied conditions.
    • The index demonstrates applicability in assessing heat strain during hypohydration.
    • PSI shows potential for evaluating heat acclimation and exercise training effects in rats.
    • The index is user-friendly, scalable (0-10), and suitable for real-time or post-analysis use.

    Conclusions:

    • The Physiological Strain Index (PSI) is a validated and versatile tool for assessing exercise/heat stress.
    • PSI's adaptability across different conditions and species enhances its universal applicability.
    • The index has the potential for widespread adoption in research and practical applications.