Thermal Balance And Pathophysiology Flashcards
What factors does the capacity of environment to absorb heat depend on?
Water vapour pressure (indicated by wet bulb T°, not just Rel Humidity)
Radiant temperature (e.g. direct solar)
Air movement (relative to the skin surface)
Resistance to heat transfer (e.g. posture)
Ambient temperature (dry bulb)
What makes hot or humid environments stressful in terms of heat exchange?
Harder to offload heat; esp. if low evaporative capacity
Requires more sweat and skin blood flow
What does capacily refer to?
Requires more sweat and skin blood flow
Example sentence: Capacily refers to the ability of the body to regulate temperature through increased sweat production and blood flow to the skin.
Why quantify heat stress?
For Safety, Clinical, Basic or Applied research
Example sentence: Quantifying heat stress is important for various purposes such as ensuring safety, conducting clinical studies, or advancing basic and applied research.
What are some things to consider in selecting thermoregulatory measures?
• Sensitivity
Can it detect anticipated change?
• Practicality
How much does it cost? Feasible in experimental setting?
• Usability
Is it comfortable? Is it safe?
• Reliability
Can you repeat the measure and get the same number?
• Validity
Does it represent what is actually happening?
These are important factors to consider when choosing thermoregulatory measures for research or practical applications.
What impairs endurance exercise capacity and performance under heat stress?
Hyperthermia-induced cardiovascular function adjustments, alterations in central motor drive, and perturbations in skeletal muscle function
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What factors can influence an individual’s heat illness risk?
A myriad of factors, some of which change acutely
Page 18 of 19 Summary - hyperthermia and heat illness
What is common in athletes due to heat stress?
Exertional heat stroke
Page 18 of 19 Summary - hyperthermia and heat illness
What are some common symptoms of heat illness?
Many symptoms are nonspecific
Page 18 of 19 Summary - hyperthermia and heat illness
What is the treatment for heat illness?
Remove from heat, cool (whole body immersion ideal), and hydrate
Page 18 of 19 Summary - hyperthermia and heat illness
