KEY CHARACTERISTICS / SUMMARY OF THE 3 ENERGY SYSTEMS
KEY CHARACTERISTICS / SUMMARY OF THE 3 ENERGY SYSTEMS
|Characteristic |ATP-PC Energy System |Anaerobic Glycolysis System |Aerobic Energy system |
|Also Known As |PC system, CP system, phosphagen system, alactic |Lactic acid system |Oxygen system, aerobic glycolysis |
| |system |Lactacid system | |
|Fuel |Phospho Creatine (PC) or |Glycogen |a) At rest: Free Fatty Acids(FFA’s) & CHO |
|Source |Creatine Phosphate | |b) Submaximal intensities: |
| |(CP) | |CHO |
| |(same thing, different name) | |Fats: when glycogen sparing & when glycogen stores |
| | | |diminished |
| | | |Proteins (only under extreme conditions such as |
| | | |starvation, extended illness of depletion of CHO’s &|
| | | |FFA’s) |
| | | |c) Maximal intensities (short duration): |
| | | |CHO only |
|Intensity of Activity |High intensity (95+% max HR) |High intensity (85%+% max HR) |a) Resting |
| | |Used for increases in intensity during long duration|b) Submaximal intensity ( 5 seconds) | |
| |Agility |Dynamic Flexibility | |
| | |Local Muscular Endurance | |
| | |Agility (only if fatiguing) | |
|Disadvantages of the energy systems |Resynthesises very limited amounts of ATP (low |Produces H+ ions that cause fatigue in large amounts|Resynthesises ATP slowly (particularly fats). |
| |Yield) |Produces large amounts of H+ which greatly |Fats have a high oxygen cost resulting in a reduced |
| |Limited stores of ATP & PC in muscle (higher in fast|decreases muscle pH |intensity. |
| |twitch fibres) |Produces relatively small amounts of ATP compared to| |
| |Produces Inorganic phosphate as a metabolic |the aerobic system. | |
| |by-product | | |
|Advantages of the energy |Resynthesises ATP explosively/immediately (High |Resynthesises ATP quickly |Resynthesises large amounts of ATP |
|systems |Rate) |Provides anaerobic energy in large amounts that |“Endless” energy provider |
| |Doesn’t need long chemical reactions |ATP-PC system (x3) |Produces non toxic by-products |
| |Used for high intensity activities |When working above 85% max HR and no chance for PC |Allows for oxidation of metabolic by-products and |
| | |replenishment, only anaerobic contributor |resynthesis of glycogen from LA |
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