Environmental Conditions

Question 1

Responses to Heat

Answer 1

• Sweat response
• Skin blood vessel vasodilation
• Peripheral blood flow
• Skin temperature increases
• Ventilation
• Core temperature increases
• HR/CO/SV/BP increases

Question 2

Conduction

Answer 2

• The transfer of energy or heat through solids that are in contact with one another

Question 3

Radiation

Answer 3

• Heat is transferred to the surrounding environment without touching

Question 4

Convection

Answer 4

• Hot air goes to cold air and vise versa

- Transfer of heat through fluids

Question 5

Evaporation

Answer 5

• Cooling of body through sweating

- Heat is lost in sweat when it gets changed into water vapour

Question 6

Heat Index

Answer 6

• A table showing the perceived temperature as a result of the actual temperature when humidity is taken into account.
• Low humidity decreases perceived temp
• High humidity increases perceived temp

Question 7

Effects of Heat on the Body

Answer 7

Increased:

• Skin temp and core temp
• HR
• Sweating
• BP
• Blood flow redistribution from muscles to skin
• Respiration
• Cardiovascular drift

Question 8

Hyperthermia

Answer 8

• Overhearing of body
• Extreme loss of salt and water through sweating
• Body breaks down

Question 9

Effects of Cold on Body

Answer 9

• Cold shock responses
• Muscles can’t contract normally
• Lack of coordination through shivering
• Reduction in core temperature
• After-drop

Question 10

Hypothermia

Answer 10

• Body is too cold
• Loss of coordination
• Uncontrollable shivering
• Shallow breathing and slow pulse
• Memory loss and slurred speech
• Unconsciousness

Question 11

Wind-chill Factor

Answer 11

• High wind makes the perceived temp lower

- Can increase chances of frostbite

Question 12

Altitude

Answer 12

• Low air pressure

- Decreased oxygen consumption

Question 13

Immediate Effects of Altitude

Answer 13

• Increased RR
• Increased HR
• Decreased VO2 Max
• Sleeplessness
• Dizziness, nausea, headaches
• Increased tidal volume
• Decrease of oxygen in blood
• Increased BP
• Decreased stroke/plasma volume

Question 14

Live High - Train High

Answer 14

• Suffer homesickness
• Different food
• Mountain sickness
• Upset patterns of sleep

Question 15

Live High - Train Low

Answer 15

• Allows for increase performance while still being able to train well.
• Not as good as low high.

Question 16

Live low - Train high

Answer 16

• Stay in a low oxygen tent

- Improves performance