energy systems Flashcards
what is rate of production?
how quickly ATP is resynthesised
what is yeild?
how much ATP is resynthesised
what is the relationship between rate and yeild?
higher yield (more ATP) = a slower rate (ATP resynthesised slower).
define the ATP - CP energy system?
An immediate energy system that does not require oxygen.
what are examples where the ATP - CP system is used?
- Athletics field events (discus, javelin, long jump)
- Sprinter
what are the disadvantages of the ATP - CP system?
- Resynthesises very limited amount of ATP
- Limited stores of ATP and PC in muscles
what are the advantages of the ATP - PC system?
- Resynthesises ATP explosively/immediately
- Doesn’t need long chemical reactions
- Used for high intensity activities
what is the anaerobic glycolysis energy system?
relies on the breakdown of glycogen, in the absence of
oxygen, to produce energy.
what is lactate acid?
- Use of the anaerobic glycolysis system = production of lactic acid
describe the characteristics of the ATP - CP energy system
- 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
describe the characteristics of the anaerobic glycolysis energy system?
- 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
what are examples where the anaerobic glycolysis system is used?
400 m runner
- Series of high intensity repeat efforts
100 m swim
what are disadvantages of the anaerobic glycolysis?
- Produces H+ ions that cause fatigue in large amounts
- Slow recovery
- Only capable of producing small amounts of ATP
what are advantages of the anaerobic glycolysis?
Resynthesises ATP quickly allowing for high intensity efforts
what is the definition of the aerobic system?
The breakdown of glycogen in the presence of oxygen
describe the characteristics of the aerobic energy system?
- 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
what are examples where the aerobic system is used?
- Endurance athletes (triathlete, marathon runner, Tour De France rider)
- Mid field player in AFL, soccer, hockey
what are the disadvantages of the aerobic system?
- Resynthesises ATP slowly (particularly fats)
- Fats have a high oxygen cost resulting in reduced intensity
what are the advantages of the aerobic system?
- Resynthesises large amounts of ATP &
produces non-fatiguing by-products
what energy system is used during the first 10 seconds of activity?
ATP-CP system
- Main source of energy
- Peaks in output at approx. 5 sec
- Fatigues quickly due to depletion ATP/PC
what energy system is used during the first 30 seconds of activity?
ANAEROBIC GLYCOLYSIS SYSTEM
- Peaks in output at approx. 20 sec
- Fatigues due to build up of lactic acid
- energy for up to 2 min
what energy system is used from 30 seconds onwards in activity?
AEROBIC SYSTEM
- point when oxygen supply has increased sufficiently to contribute ATP
