Heat and humidity
- Created by: b2e5n14
- Created on: 16-01-21 12:20
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- Heat and humidity
- Physiological effects
- Vasodilation of vessels at the skin
- Increase in blood flow
- Increase in blood pooling in limbs
- Decrease in blood volume, SR, Q and BP
- Increase in HR
- Increase in strain on CV systems
- Decrease in oxygen transport to muscles
- Vasodilation of vessels at the skin
- Impact on respiratory system
- Dehydration
- Increase in mucus production
- constriction of the airways
- Decreased volume of gaseous exchange
- Increased breathing rate
- Maintains O2 levels
- Increased cost of 02
- Increased pollutants in the air
- Irritates the airways
- Leads to...
- Increased O2 cost of exercise
- Decreased aerobic energy production
- Performer becomes more reliant on anaerobic system
- Lactic acid accumulates faster
- Aerobic capacity reduced
- decrease performance in endurance events
- Dehydration
- Direct effects of heat
- High temperatures can...
- Impact performance
- Impact the health of players and spectators
- Disrupt scheduling events
- Immediate response to heat
- a product of an exothermic reaction
- Heat circulates to the surface of the skin
- Vessels dilate and release heat with sweat
- Positives
- Removes excess heat quickly
- Negatives
- Causes excess water loss
- High temperatures can...
- Dehydration
- Water out is greater than the water in
- Hyperthermia
- Severe increase in body temperature
- Casued by...
- Hard and prolonged exercise
- High air temperature
- High relative humidity
- Reducing effects of heat
- Pre comp
- Acclimatise to environment-7 to 14 days
- Cooling aids
- During comp
- Pacing techniques
- Suitable clothing
- Post comp
- Cooling aids
- Rehydration
- Pre comp
- Physiological effects
- Thermo-regulation
- Process of maintaining core body temp
- Wet bulb globe temperature
- Used to predict the effects on performance
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