ENVIRONMENTAL CONDITIONS - HEAT 2 Flashcards
physiological changes in these environments
Define Double heat load
Is when the body is forced to deal with 2 types of heat affecting the body for example, Metabolic and Environmental
Define Cardiovascular drift (cardiac drift)
Is when the heart rate maintain the cardiac output because there is a decrease in the stroke volume output
Define Dehydration
When the amount of fluid being lost is greater than the amount of fluid being taken in
We lose water by 3 ways name them?
- Urinating
- Sweating
- Breathing
Muscles and vital organs require blood flow to
Sustain energy metabolism
How does the blood keep the core temp cool?
Sends the the blood flow to the environment
However this blood sent to the environment cannot do what?
Send blood to the working muscles and affecting performance
When exercising in the heat, the body directs blood flow to the what? and away from the what? to increase what?
Skin
Working muscles
Heat loss via evap
A reduction in blood flow to the working muscles increases the production and build up of what?
Lactic Acid
Reducing blood flow to the skin reduces the what? inhibiting the body’s ability to what? this then leads to what?
Sweat Rate
Lose heat via evaporation
rise in core temp which negatively impacts the core temp
Heat-related injuries are progressive – they occur in a particular order list them in order?
Stage 1: Dehydration
Stage 2: Heat Exhaustion
Stage 3: Heat Stroke
Name Stage 1 in Heat-related injuries and explain it
Stage 1: Dehydration
Is when the amount of fluid lost is greater than the amount of fluid being taken in.
Name Stage 2 in Heat-related injuries and explain it
Stage 2: Heat Exhaustion
Occurs when the athlete continuous to keep exercising even when they are losing more fluid they can replace, they risk moving into stage 3
Name Stage 3 in Heat-related injuries and explain it
What can it cause
Stage 3: Heat Stroke
When the body stops sweating as it cannot do this anymore, the core temp is rising to dangerous or life-threatening levels, because of lack of evaporating cooling.
Cause Hyperthermia
Define Hyperthermia
Hyperthermia is elevated body temperature above 38 Degrees due to failed thermoregulation that occurs when the body produces or absorbs more heat than it dissipates.
