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hyperthermia
elevated body temperature
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hypothermia
- low body temperature
- death is imminent if core temp drops 77-85
- prevent: apparel layers, prevent chilling, lightweight, replace fluids, not restricted movement
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acclimatization
process of becoming accustomed to new environment
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chilblains
results from prolonged and constant exposure to cold for many hours and produces skin redness, swelling, tingling, pain in toes and fingers
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circadian dysrhythmia
stress caused by jet travel when flying east or west at high speeds that alter athletes time clock
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conductive heat exchange
- physical contact with other objects that result in either heat loss or heat gain
- ex: standing on synthetic turf
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convective heat exchange
- when a mass of either air or water moves around an individual
- ex: wind, hot tub
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evaporative heat loss
sweat glands in the skin allow water to be transported to the surface, where it then evaporates
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jet lag
physical and mental effects caused by traveling rapidly across several time zones
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metabolic heat production
normal metabolic function in the body results in production and radiation of heat
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radiant heat exchange
radiant heat from sunshine increases body temperature
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heat rash
- also called prickly heat
- condition associated with red, raised rash accompanied by sensations of prickling and tingling during sweating
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heat syncope
- heat collapse
- rapid physical fatigue during overexposure to heat caused by standing in heat for long periods or by not being accustomed to exercise in heat
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heat cramps
- occur because of imbalance between electrolytes and water
- prevented by adequate replacement of ions to most importantly water
- increase table salt, bananas, milk
- large quantities of water with mild stretching
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heat exhaustion
- victim will collapse and sweat profusely
- pale skin, mildly elevated temp, dizziness, hyperventalation, rapid pulse
- IV replacement of fluid, rectal temp, place athlete in cool environment
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heat stroke
- Emergency
- sudden collapse with loss of consciousness, hot skin with less sweating than seen with heat exhaustion
- core temp 104 or higher
- get athlete to cool environment, strip off clothing, sponge down with cool water
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What are ways to prevent heat illness?
- gradual acclimatization
- identification of susceptible individuals
- routine weight record keeping
- fluid replacement
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frostnip
- ears, nose, cheeks, chin, fingers, toes
- high wind, severe cold, or both
- skin appears firm with cold painless areas that may peel or blister
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frostbite
- superficial: involves only skin and subcutaneous tissue, rewarming will feel numb then will sting and burn
- deep: serious injury, involves tissue freezing, requires immediate hospitalization
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altitude
- Mexico City (7600 ft elevation) has 7-8% decrease in oxygen uptake
- natives have larger chest capacity, more alveoli, more capillaries to transport blood to tissue
- adaption takes from 3 days to 2-3 weeks
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acute mountain sickness
- 1 out of 3 individuals experience it
- headache, nausea, vomiting, sleep disturbance
- may last 3 days - attributed to tissue disruption
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pulmonary edema
- 9000-10,000 ft
- small amount of fluid within alveolar walls can collect in lungs
- dyspnea, cough, headache, weakness, some unconciousness
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sickle cell trait reaction
- 8-10% African Americans
- abnormality of red blood cells & hemoglobin content
- high altitudes causes abnormal molecules to clump together
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