Exercise in Heat Flashcards
Heat acclimitisation
Used to get an athlete used to exercise within the heat
Reduced Salinity
Pre sweating response
Used to help marathon runners get used to being in the heat for prolonged periods
Olympic events
Summer tournaments
Too much heat causes:
Dehydration
Increase in core temp
Restricted blood flow
Decreased glycogen capacity
How can human keep their temperature within a specific range
Can be lost by radiation, conduction, conviction and evaporation
Can be gained by metabolism or the environment
How is temperature monitored
Thermometers
Thermoguns
These ain’t accurate at all usually off by one degree
Thermometer pills allowing for true internal temps
Rectal probe
Core monitor
Like a heart strap
Maximal temperature for a study is 39.5
Thermo-regulatory control
Regulated by the preoptic-hypothamulus
Thermoreceptors detect this through the sympathetic nervous system
response to heat
Performance decreases over time
Heart rate increase
Wet bulb globe thermometer
Takes into account dry heat
Those who take fluids tend to have lower core temperatures during prolonged exercise as they can maintain skin blood flow
Heat Acclimatisation
Physiological changes as a result of living in a hot climate for a while
By performing a period of heat acclimatisation athletes can develop beneficial Physiological changes and adaptations that may help maintain prolonged exercise
Benefits of of heat acclimitsation
Increased plasma volume
Reduced heart rate
Increased sweat rate
Reduced core temperature
Methids of heat acclimation which are done closer to a given event
Baseline testing
Isoprogressive maintaining core temperature
Short and long term adaptation
Going off to warmer climates
When it goes wrong
May over rise of core temperature
Heat stroke deaths
Caused due to a failure of recognised symptoms
Medical tents which have ice baths
Races maybe cancelled or delayed
