Environmental effects on the body - Heat

Question 1

Impact

Answer 1

process of thermoregulation allows a performer to maintain their core body temperature.
- causes sweat which leads to dehydration
- core temperature increases

Question 2

Cardiovascular drift

Answer 2

occurs when exercising in the heat:
1. excessive sweating to help reduce core temperature
2. reduced blood plasma levels
3. increased blood viscosity
4. reduction in venous return
5. reception in stroke volume
6. increased heat rate.

Question 3

Hyperthermia

Answer 3

a rise in core body temperature of several degrees
caused by prolonged high intensity exercise and high air temperature.

Question 4

Impact of hyperthermia

Answer 4

• this can lead to respiratory problems such as restriction of the airways and increased breathing frequency.
• confines with cardiovascular drift leads to THERMAL STRAIN.

Question 5

Effects of heat on the CV system

Answer 5

dilation of arterioles - leading to increased blood flow and blood pooling in limbs.
decreased blood volume, SV, CO and BP - increased heart rate and strain on the heart.

Question 6

Effects of heat on the respiratory system

Answer 6

dehydration and drying of airways making breathing difficult
increased breathing frequency

Question 7

Strategies to maximise performance

Answer 7

7-14 days of acclimatisation in the conditions.
Cooling aids
Rehydrating during competition.