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Illinois State University Evaporation l Sweat must evaporate to provide cooling. l Sweat that drips off the skin provides little or no cooling.
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Illinois State University
Thermal Regulation and Exercise
Chapter 14
Illinois State University
Normal Temperature 36.1 to 37.8 C (97.0 to 100.0 F).
Illinois State University
Evaporation Sweat must evaporate to provide
cooling.
Sweat that drips off the skin provides little or no cooling.
Illinois State University
Humidity Humidity - water saturation level of the
air.
Illinois State University
Temperature Temperature
– Aural– Sublingual– Esophageal– Rectal
Illinois State University
Illinois State University
Hypothalamus Houses your thermoregulatory center.
Acts like a thermometer, monitoring your temperature and causing heat loss or production as needed.
Illinois State University
Temperature Sensors Peripheral receptors - skin.
Central receptors - core temperature.
Illinois State University
Exercise in the heat: Heat fatigue and heat cramps Heat exhaustion Heat stroke
Illinois State University
Heat Stress Index
Illinois State University
Exercise in the heat Repeated exposure to heat stress
causes a gradual improvement in your ability to lose excess heat.
Acclimatization.
Illinois State University
Exercise in the cold Shivering Hormonal warming (sympathetic
nervous system) Peripheral vasoconstriction
Illinois State University
Exercise in the cold Surface area and subcutaneous fat. Wind chill. Immersion in water.
Illinois State University
Wind Chill Index
Illinois State University
Exercise in the cold Hypothermia (34.5 or 94.1). Frostbite. Layering.