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Slide 1

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Onset Blood Lactate
point where lactic acid levels increase
this decreases PH levels affecting the
functioning of phosphofructokinase preventing
further ATP synthesis
also affects cross bridge formation in muscle
trained athlete - 70-80% VO2 max
untrained athlete - 50-60% VO2 max…read more

Slide 2

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Slide 3

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LACTIC ACID…read more

Slide 4

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Lactic Acid resynthesis
The Cori Cycle (20%)
lactic acid in muscle > blood > glycogen in the liver
Lactate Shunting (70%)
Type I fibres > oxidised for energy
Converted into Protein (10%)
50% in approximately 15 minutes, 100% in
around an hour, dependent on....?…read more

Slide 5

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Excess Post-Exercise
Oxygen Consumption
oxygen consumed after exercise to make up for
that missed during anaerobic period at the
beginning of movement (graph see p384)
Dependant on type of exercise performed
returns the body to homeostasis by removing
waste products of exercise
2 Stages ­ Alactic and Lactic Acid
With training the time it takes to return to
homeostasis changes ­ How and why?…read more

Slide 6

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Independent research
Use p384 ­ 387 to find the following information
10 minutes!
How many litres of oxygen are typically consumed during the
Alactic and Lactic acid components of EPOC?
What is happening in the muscle during each stage of EPOC?
What implications does this have for planning training
programmes?…read more

Slide 7

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