Heat & Cold Flashcards
Conduction transfers heat how?
Through direct touch, eg. Aluminum touching skin
How is heat lost?
Through sweat, respiration and urination
Radiation transfers heat how?
Heat is transferred from warmer body to cooler surrounding.
60% of heat lost
Convection transfers heat how?
When heat is carried away from the body on air or water currents
12% heat loss
Evaporation transfers heat how?
Cooling of the body due to sweating
At rest 25% hot climate 80%
What is sweat?
A cooling mechanism
If your dehydrated what happends?
Your blood gets thicker, more viscuss.
Increases body temp
Decrease in performance
What is Double heat loading?
When blood becomes thick (viscuss) it’s harder to pump around the body. Everything slows down.
How to we replace sweat?
Through drinks with electrolytes
What are signs if heat stroke?
Feeling hot, less coordinated, headaches, sweating stops.
What is hypothermia?
When a person gets to hot, generally due to little salt in blood.
What does acclimating to the heat involve doing?
Working harder to reach same intensity
Faster rate of dehydration and fatigue
Elevated hr
Increased resting temp
Cold whether reduces sensation of…
Thirst
In water what heat transfers increase and by how much?
Radiation and convection
4 times faster
Shivering is…
The body’s mechanism for producing heat skeletal fibers
