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A level Pe (me) > Chunk PE revision > Flashcards

Chunk PE revision Flashcards

1
Q

What % does the PP of oxygen drop when you get to the altitude of 5000m?

A

50%

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2
Q

What is the minimum height for altitude training?

A

2500m

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3
Q

What does the drop in PP of oxygen lead to?

A

A reduction in the diffusion gradient of oxygen between the air and the lungs, and the alveoli and blood.

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4
Q

What does this diffusion gradient between the air and lungs mean?

A

Not as much oxygen diffuses into the blood, so haemoglobin is not fully saturated with oxygen.

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5
Q

What does un-fully saturated haemoglobin lead to?

A

Less oxygen being delivered to working muscles.

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6
Q

What does less oxygen at working muscles mean?

A

Reduction in aerobic performance and Vo2 max.
Quicker onset of anaerobic respiration - LA build up

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7
Q

4 advantages of altitude trining?

A

Increase no of RBC’s
Increased Conc. of haemoglobin
Increase in capillarization
Increase in lactate tolerance

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8
Q

5 disadvantages of altitude training?

A

Difficult to train at high intensity with less o2.
Altitude sickness
Benefits lost quickly when returning to sea level.
Homesickness
Expensive

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9
Q

What is Indirect Calorimetry?

A

Technique that provides an accurate estimate of energy expenditure through gas exchange.

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10
Q

What does Indirect Calorimetry measure?

A

How much CO2 is produced, and how much O2 is produced during rest and aerobic exercise.

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11
Q

What can Indirect Calorimetry be used to find?

A

The main substrate being used, fat or carbohydrate.

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12
Q

benefit of indirect calorimetry?

A

Gives a calculation of VO2 (O2 consumption)
And VO2 max (max rate of O2 consumption)

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13
Q

Negatives of Indirect Calorimetry?

A

Cannot be used for all sports.
Gas leaks are common
Can be uncomfortable

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14
Q

What does lactate sampling involve?

A

Taking a small blood sample from the ear or fingertip, to see how much lactate is present in blood.

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15
Q

What are lactate measurements used for?

A

Used amongst elite performers to monitor training and predict performance.

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16
Q

What else can the measurements be used for?

A

Measures the exercise intensity at which lactate threshold occurs (when the level of lactate in blood reach a certain level).

17
Q

If results show a lower lactate level at the same intensity of exercise, it shows the performer has…

A

Increased peak speed/power.
Lengthened time to exhaustion.
Improved recovery heart rate.
A higher lactate threshold.

18
Q

EPOC meaning?

A

Excess post-exercise oxygen consumption.

19
Q

EPOC definition?

A

The amount of oxygen consumed during recovery, and above that which would have been consumed at rest during the same time.

20
Q

What is the fast component of EPOC called?

A

The alactacid component.

21
Q

What is the slow component called?

A

The lactacid component.

22
Q

What 2 things happen in the fast component of EPOC?

A

restoration of ATP and phosphocreatine stores.
Re-saturation of myoglobin with O2

23
Q

In the fast component, how much PC is restored in 30s?

A

50%

24
Q

in the fast component, how long does it take to completely restore PC stores?

A

2-3 minutes

25
Q

in the fast component, how much O2 does it take to completely restore PC stores?

A

3 litres

26
Q

in the fast component, how long does it take to restore myoglobin with O2?

A

up to 2 minutes.

27
Q

How much O2 does it take to restore myoglobin?

A

0.5 litres

28
Q

What 2 things happen in the slow component of EPOC?

A

Removal of lactic acid.
Replenishment of glycogen.

29
Q

How long does the lactacid component of EPOC take?

A

Over an hour

30
Q

What factors influence the time of the slow component of EPOC?

A

Duration and Intensity of the exercise.

31
Q

How much O2 does the lactacid component use?

A

4-6 litres

32
Q

When is the best time to eat in order to restore muscle glycogen?

A

1-3 hours from finishing exercise.

33
Q

What does the carbo-window entail?

A

Eating a high carbohydrate meal within 20 minutes of finishing exercise.

34
Q

How is lactic acid removed from the body? (4 ways)

A

Through sweat and urine.
Converted into Protein.
Converted into Pyruvic Acid.
Converted into glycogen.

A level Pe (me) (13 decks)

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