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Pulse rate-rectal temperature relationships during prolonged work.

K V Kuhlemeier, J M Miller

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |March 1, 1978
    PubMed
    Summary
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    Industrial workers' heart rates during prolonged work can be predicted using rectal temperatures. Factors like work rate and acclimatization significantly influence this relationship, impacting heat stress monitoring.

    Area of Science:

    • Occupational Health
    • Environmental Physiology
    • Human Factors Engineering

    Background:

    • Industrial work environments expose workers to varying heat loads.
    • Monitoring physiological responses is crucial for preventing heat-related illnesses.
    • Heart rate and rectal temperature are key indicators of thermal strain.

    Purpose of the Study:

    • To establish a predictive relationship between heart rate and rectal temperature in industrial workers.
    • To investigate the influence of work rate and acclimatization on this physiological relationship.
    • To provide a tool for estimating heat stress in occupational settings.

    Main Methods:

    • Studied 46 industrial workers performing 653 work bouts across diverse work rates and temperatures.

    Related Experiment Videos

  • Measured heart rates and rectal temperatures simultaneously during 1-hour work periods.
  • Utilized multiple linear regression to model the relationship between heart rate and rectal temperature.

    • Main Results:

    • Developed a regression equation: heart rate = 29.3 * rectal temperature - 988.6.
    • Found that work rate and acclimatization significantly alter the heart rate-rectal temperature relationship.
    • Demonstrated a range of predicted heart rates (109-143 bpm) for a rectal temperature of 38.0°C based on acclimatization and work rate.

    Conclusions:

    • Heart rate can reliably predict rectal temperature in industrial workers under prolonged work conditions.
    • Accurate prediction requires knowledge of individual acclimatization levels and work rates.
    • This model aids in assessing thermal strain and managing heat stress risks in occupational environments.