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intro to human movement > Energy Systems > Flashcards

Energy Systems Flashcards

1
Q

Energy

A
  • Enters the body in the form of food
  • Used when absorbed and broken down
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2
Q

Adenosine triphosphate (ATP)

A
  • The end-product of food ingestion.
  • Chemical substance found in every living cell
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3
Q

ATP Structure

A

Made up of adenosine and 3 phosphates

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4
Q

ATP Breakdown

A
  • Phosphate is broken off and energy is released from the bond
  • Energy is now available for cellular activity
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5
Q

ATP Resynthesis

A

Body stores 80-100g of ATP

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6
Q

Anaerobic Pathway

A

(Without Oxygen)
- Phosphagen system
- Lactate system

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7
Q

Aerobic Pathway

A

(With Oxygen)
- Aerobic glycolysis
- Fatty acid oxidation

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8
Q

Phosphagen System

A
  • Type: Anaerobic
  • Fuel source: Creatine phosphate (CP)
  • Intensity: 95 - 100% of maximal effort
  • Duration: 1 - 10 s
  • Recovery time: About 30 s – 2 mins
  • Used in: Sports or activities requiring explosive power
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9
Q

Lactate System

A
  • Type: Anaerobic
  • Fuel source: Glycogen
  • Intensity: 60 - 90% of maximal effort
  • Duration: 30 s – 3 mins
  • Recovery time: 20 mins – 2 hours
  • Used in: Field sports, track and field
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10
Q

Benefits and Disadvantages of the Phosphagen System

A

Benefits
* No oxygen required
* Very rapid rate of ATP
production
* No negative by products
* Responsive to training

Disadvantages
* Limited stores of CP in the muscle

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11
Q

Benefits and Disadvantages of the Lactate System

A
  • No oxygen required
  • Greater production of ATP than
    phosphagen system
  • Lasts for longer than phosphagen system
  • Responsive to training
  • ↑ lactate tolerance
  • ↑ lactate removal

Disadvantages
* Increase in muscle acidity

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12
Q

Aerobic System

A
  • Type: Aerobic
  • Fuel source: Glycogen or fat
  • Intensity: <60% of maximal effort
  • Duration: >3 mins
  • Recovery time: Duration of time to replace fuel (24 – 48 hours)
  • Used in: Endurance events
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13
Q

Benefits and Disadvantages of the Aerobic System

A

Benefits
* Greater production of ATP
* Lasts for longer
* Can use fat as a fuel
* Responsive to training
- ↑ recovery from anaerobic interval training

Disadvantages
* Slow to get going as it is a complicated process

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14
Q

Oxygen Deficit

A

Supply of energy by anaerobic systems at the start of exercise

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15
Q

Excess Postexercise Oxygen Consumption (EPOC)

A

O2 uptake above resting values that is used to restore the body to a pre-exercise state.

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16
Q

Steady State Oxygen Consumption

A

When O2 supply meets O2 demand.

17
Q

Anaerobic Threshold

A

The metabolic demands of exercise can no longer be met by aerobic energy sources

intro to human movement (8 decks)

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