Click below for an excellent detailed explanation of the 3 energy systems.
https://biology-stlukes.wikispaces.com/Energy+Systems
Energy Systems
| |
ATP PC |
Lactic Acid |
Aerobic |
| Source of fuel |
Creatine Phosphate |
Glycogen |
Glycogen / Fat /(Protein) in extremes |
| Efficiency of ATP production |
Extremely quick. Does not make ATP but regenerates ADP. |
2 molecules of ATP per molecule of glycogen. Fast to supply ATP. |
38 ATP per molecule of Glycogen. Slower to produce than other methods. |
| Duration that the system can operate |
5-15 seconds |
45 - 90 seconds |
unlimited while fuel source is available |
| Cause of fatigue |
Depletion of creatine phosphate |
Build up of lactic acid |
depletion of fuel |
| By products of energy production |
nil |
lactic acid |
Heat, CO2, water |
| Process and rate of recovery |
takes 10-30 seconds for the PC to resynthesise to be used again |
Takes from 20 minutes to an hour to breakdown the lactic acid and restore muscle glycogen levels |
takes up to 2 days to fully replensih glycogen stores after extended duratiom events |
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