Energy Systems Flashcards
Fuel source and by products of the ATP-PC system
It uses a chemical fuel of phosphocreatine which is available at the muscular site. Chemical reactions are simple and quick as the ATP breaks down into ADP and inorganic phosphate energy is released. The byproducts of this are inorganic phosphate and adp.
Intensity and duration of the ATP-PC system
The ATP-PC system is used during supra maximal intensity activity (95% hr Max) explosive movements. Due to limited fuels available dominat duration is only 1-10 seconds with peak power at 2-4 seconds
Advantages of ATP-PC system
Doesn’t require oxygen. Simple reactions
Energy is available immediately for explosive actions
Resynthesis is really fast.
Disadvantages of ATP-PC system
Very limited fuel available at muscular site.
Short duration.
Buildup of inorganic phosphate can result in sodium potassium pump becoming inefficient.
Fuel sources and by products of the anaerobic glycolosis system
Glycogen is the fuel source of the anaerobic system.
Breakdown of glycogen provides about 2-3 ATP. But the incomplete breakdown of pyruvic acid due to absence of oxygen results in the by products lactic acid which is broken into lacxate and the fatiguing product hydrogen ions.
Hydrogen ions
Hydrogen ions (h+) fatigue the body by increasing muscle acidity and decreasing muscle ph which inhibits muscular contractions. Limiting the force which the muscles can create.
Intensity and duration of the anaerobic glycolysis system
High intensity events 85% heart rate max. It is used for increases in intensity during long duration events where PC stores haven’t been restored. It lasts from 10 seconds to a minute when the build up of lactic acid forces the body to reduce intensity in order to break it down. Peak power 5-15 seconds.
Advantages of the anaerobic glycolysis system
Resynthesises ATP quickly.
Doesn’t require oxygen.provides energy at high intensities when PC stores have been depleted
Disadvantages of the anaerobic glycolysis system
Produces fatiguing by products
Fuel and byproducts of the aerobic glycolysis system. (Kerbs cycle) (electron transport chain)
During sub maximal exercise carbohydrates are the primary fuels source and once glycogen stores are depleted fat is used.
At rest fats are used but the number of chemical reactions required make it unsuitable for use during exercise. By product of the kRebs cycle is carbon dioxide which is breathed out. By products of the electron transport chain are h20 and heat produced by reactions.
Intensity and duration of aerobic glycolysis system
It is used during prolonged sub maximal exercise lasting from over a 1 minute to 3 hours +. ATP is produced at a slow rate but in large quantities.
Advantages of the aerobic glycolysis system
Large amounts of ATP produced.
No fatiguing by products.
This system can be used until fuels are completely depleted
Allows the oxidation and resynthesis of byproducts from the anaerobic systems
Disadvantages of the aerobic glycolysis system
Slow resynthesis of ATP
Low intensity
