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Responses to Heat and Cold Stress02:45

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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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The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
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Decreased Body Temperature01:29

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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
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Related Experiment Video

Updated: Nov 24, 2025

Short-Duration Hypothermia Induction in Rats using Models for Studies examining Clinical Relevance and Mechanisms
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Cooling Interventions Among Agricultural Workers: A Pilot Study.

Roxana Chicas1, Nezahualcoyotl Xiuhtecutli2, Lisa Elon1

  • 1Emory University.

Workplace Health & Safety
|December 28, 2020
PubMed
Summary
This summary is machine-generated.

Agricultural workers using cooling bandanas showed potential protection against exceeding core body temperature thresholds (Tc38) in hot environments. This study highlights effective heat stress mitigation strategies for manual laborers.

Keywords:
agricultural workerscooling interventionscore body temperatureheat stressheat-related illness

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Area of Science:

  • Occupational Health
  • Environmental Physiology
  • Heat Stress Management

Background:

  • Agricultural workers face health risks from chronic heat exposure due to high temperatures and manual labor.
  • Heat-related illnesses are a significant concern in agricultural settings.

Purpose of the Study:

  • To evaluate the effectiveness of cooling devices in preventing agricultural workers from exceeding a core body temperature threshold of 38.0°C (Tc38).
  • To assess the attenuation of heat-related illness symptoms using biomonitoring equipment.

Main Methods:

  • Randomized controlled trial involving 84 agricultural workers in Florida.
  • Four groups: no intervention, cooling bandana, cooling vest, or both.
  • Biomonitoring included core body temperature and physical activity measurement.

Main Results:

  • The cooling bandana group showed lower odds of exceeding Tc38 compared to the control group.
  • The cooling vest group exhibited higher odds of exceeding Tc38.
  • Combined use of vest and bandana showed minimal difference from the control group.

Conclusions:

  • This field study is the first to use biomonitoring for cooling interventions in US agricultural workers.
  • Cooling bandanas show promise in protecting agricultural workers from exceeding safe core body temperature limits.