Exercise Physiology Flashcards

1
Q

4 Ways in which heat loss can occur

A

conduction, convection, radiation + evaporation.

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2
Q

Conduction

A

heat exchanged by two objects in contact.

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3
Q

Convection

A

heat exchanged by contact with fluid that is flowing.

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4
Q

Radiation

A

occurs when heat is transferred from a warmer body to the cooler surroundings without physical contact.

heat loss = occurs when core temp is higher than ambient temp

heat gain = occurs when ambient temp is higher than core temp

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5
Q

Evaporation

A

the cooling of the body as a result of the vaporisation of sweat. (most effective in dry conditions)

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6
Q

Dehydration

A

occurs when the amount of water leaving the body is greater than the amount being taken in.

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7
Q

Heat acclimatisation

A

when heat tolerance is improved by repeated exposure to hot environments.

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8
Q

Exercising in cold weather

A

athletes will use more glycogen and fats due to shivering using them as a fuel source. this will have a negative impact on performance as glycogen stores will deplete earlier in the event.
- increase amount of CHO and fats in diet.

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9
Q

Physiological response to cold weather

A

peripheral vasoconstriction, shivering, piloerection

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10
Q

Peripheral vasoconstriction

A

involves the redirection of blood flow, away from the skins surface and towards the bodies core, to help minimise heat transfer from the blood to the cold external environment.

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11
Q

Shivering

A

involuntary muscular contractions designed to help increase heat production.

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12
Q

Piloerection

A

when the hairs on the body stand on end and trap a warm layer of air close to the skin to help keep the skin surface warm.

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