Oxygen deficit and EPOC
VO2 lagging at the start of exercise, what covers the gap, and the consumption that stays high afterwards.
- 13 cards
- 4 topics
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- Concepts
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A few cards from the deck
Oxygen deficit: what is it?
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The gap between oxygen needed and oxygen used at the start of exercise.
VO2 takes 2 to 3 minutes to adjust.
Why are we still breathless minutes after a 400 m?
- EPOC repays stores and clears exercise by-products
- The heart stopped
- VO2 fell below rest
- Lactate blocks breathing
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EPOC repays stores and clears exercise by-products
Expenditure continues after stopping.
Steady state: what is it?
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The plateau where VO2 meets the demand of moderate exercise.
It does not exist at very high intensities.
Why does a warm-up reduce the oxygen deficit?
- It fills lactate stores
- VO2 is already raised when exercise starts
- It removes the ATP-PCr system
- It lowers heart rate
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VO2 is already raised when exercise starts
Less lag, less deficit.
Covering the deficit: what is it?
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During the deficit, phosphocreatine and glycolysis supply the missing ATP.
Energy systems always overlap.