Chapter 7 Flashcards

1
Q

What are the 3 main training adaptations that allow trained athletes to generate more ATP aerobically?

A
  1. more rapid increase in muscle bioenergetics
  2. more rapid increase in blood flow
  3. Disproportionally larger regional blood flow to active muscle complimented by cellular adaptations.
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2
Q

What are 3 factors that allow athletes to develop their lactate producing capacity?

(the slide words this very oddly)

A

1) Improved motivation during training.

2) Increased intramuscular glycogen stores with training.

3) Training-induced increase in glycolytic-related enzymes.

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3
Q

What are the 2 things that glucose derived from lactate can do?

A
  1. Return to skeletal muscle from the blood for energy metabolism
  2. be synthesized as glycogen for storage
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4
Q

Why can trained athletes perform steady state exercise at 80-90% of their aerobic capacity?

A
  1. Specific genetic endowment
  2. Specific local training adaptations that favor less lactate production
  3. More rapid rate of lactate removal at any exercise intensity
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5
Q

When does the blood lactate threshold occur?

A

when muscle cells can neither meet energy demands aerobically nor oxidize lactate at its rate of formation.

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6
Q

What happens to accumulated lactate in the body (3 fates; give % of lactate that meets this fate)

A

70% oxidized

20% converted to glucose in muscles and liver

10% synthesizes amino acids

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7
Q

What 4 factors determine V02 max?

A
  1. Ventilation
  2. Central blood flow
  3. Active muscle metabolism
  4. Peripheral blood flow
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8
Q

Describe a type 1 muscle fiber:

A
  • Generates energy through aerobic pathways.
  • Slower contraction speed than fast-twitch fibers.
  • Active in continuous activities requiring steady-rate aerobic energy transfer.
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9
Q

Describe a type 2 muscle fiber:

A
  • Rapid contraction speed and high capacity for anaerobic ATP production in glycolysis; highly active in change of pace and stop
    and go activities.
  • Type IIa: High aerobic capacity.
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10
Q

What is involved in recovering from steady state exercise?

A

re-synthesis of high-energy phosphates; replenishment of O2 in blood, bodily fluids, and muscle myoglobin; and a small energy
cost to sustain elevated circulation and ventilation.

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11
Q

How does aerobic exercise in the recovery process help to remove lactate from the blood?

A
  • Increased blood perfusion through the liver, heart, and ventilatory muscles.
  • Increased blood flow through skeletal muscles in active recovery.
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12
Q

Explain what intermittent interval training aims to do and how it does this:

A

aims to overload a specific energy transfer system by manipulating work to rest ratios

enables rapid recovery to allow for more bursts of intense exercise

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13
Q

How does lactate shuttling between cells affect energy metabolism?

A

it allows glycogenolysis in one cell to provide other cells with fuel for oxidation

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14
Q

What 5 physiologic systems are involved in one’s V02 max?

A

Hemoglobin concentration

peripheral blood flow

pulmonary ventilation

blood volume and cardiac output

aerobic metabolism

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15
Q

What is EPOC and what

A
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