energy systems

Question 1

what is rate of production?

Answer 1

how quickly ATP is resynthesised

Question 2

what is yeild?

Answer 2

how much ATP is resynthesised

Question 3

what is the relationship between rate and yeild?

Answer 3

higher yield (more ATP) = a slower rate (ATP resynthesised slower).

Question 4

define the ATP - CP energy system?

Answer 4

An immediate energy system that does not require oxygen.

Question 5

what are examples where the ATP - CP system is used?

Answer 5

• Athletics field events (discus, javelin, long jump)

- Sprinter

Question 6

what are the disadvantages of the ATP - CP system?

Answer 6

• Resynthesises very limited amount of ATP

- Limited stores of ATP and PC in muscles

Question 7

what are the advantages of the ATP - PC system?

Answer 7

• Resynthesises ATP explosively/immediately
• Doesn’t need long chemical reactions
• Used for high intensity activities

Question 8

what is the anaerobic glycolysis energy system?

Answer 8

relies on the breakdown of glycogen, in the absence of

oxygen, to produce energy.

Question 9

what is lactate acid?

Answer 9

• Use of the anaerobic glycolysis system = production of lactic acid

Question 10

describe the characteristics of the ATP - CP energy system

Answer 10

• fuel source = creatine phsphate
• intensity = high intensity (95% max HR)
• rate of ATP production = very fast
• yeild = smallest (<1 ATP)
• by products = ADP and inorganic phosphates
• duration = 0-10 seconds
• dominant = 1-5 seconds
• recovery = passive

Question 11

describe the characteristics of the anaerobic glycolysis energy system?

Answer 11

• fuel source = glycogen
• intensity = high intensity (85% max HR)
• rate of ATP production = fast
• yeild = small (2-3 ATP)
• by products = lactic acid, H ions, ADP
• duration = 10-75 seconds
• dominant = 5-60 seconds
• recovery = active

Question 12

what are examples where the anaerobic glycolysis system is used?

Answer 12

400 m runner
- Series of high intensity repeat efforts
100 m swim

Question 13

what are disadvantages of the anaerobic glycolysis?

Answer 13

• Produces H+ ions that cause fatigue in large amounts
• Slow recovery
• Only capable of producing small amounts of ATP

Question 14

what are advantages of the anaerobic glycolysis?

Answer 14

Resynthesises ATP quickly allowing for high intensity efforts

Question 15

what is the definition of the aerobic system?

Answer 15

The breakdown of glycogen in the presence of oxygen

Question 16

describe the characteristics of the aerobic energy system?

Answer 16

• fuel source = glycogen, fats and proteins
• intensity = Resting &
  Submaximal intensity
  (< 80% HR max)
• rate of ATP production = Slow
• yeild = Largest (36 – 38)
• by products = CO2, H2O & Heat
• duration = >75 seconds
• dominant = 75+ seconds
• recovery = active

Question 17

what are examples where the aerobic system is used?

Answer 17

• Endurance athletes (triathlete, marathon runner, Tour De France rider)
• Mid field player in AFL, soccer, hockey

Question 18

what are the disadvantages of the aerobic system?

Answer 18

• Resynthesises ATP slowly (particularly fats)

- Fats have a high oxygen cost resulting in reduced intensity

Question 19

what are the advantages of the aerobic system?

Answer 19

• Resynthesises large amounts of ATP &

produces non-fatiguing by-products

Question 20

what energy system is used during the first 10 seconds of activity?

Answer 20

ATP-CP system

• Main source of energy
• Peaks in output at approx. 5 sec
• Fatigues quickly due to depletion ATP/PC

Question 21

what energy system is used during the first 30 seconds of activity?

Answer 21

ANAEROBIC GLYCOLYSIS SYSTEM

• Peaks in output at approx. 20 sec
• Fatigues due to build up of lactic acid
• energy for up to 2 min

Question 22

what energy system is used from 30 seconds onwards in activity?

Answer 22

AEROBIC SYSTEM

- point when oxygen supply has increased sufficiently to contribute ATP