The answer is: "Yes".
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A combination of genetics and environment.
Answer: You should list the answer choices, however if you cannot, I will list all of the advantages of the lactic acid system:
- Provides more sustained high-intensity energy for between 10 and 180 seconds.
- Can work both anaerobically (without oxygen) and aerobically (with oxygen).
- There is a huge amount of glycogen stored in the muscles and liver which can be made available for energy.
- Fewer reactions than the aerobic energy system are needed to produce energy so it is faster (but not as fast as the PC system).
- It is more efficient than the ATP-PC system as the lactic acid system resynthesises two molecules of ATP as opposed to just one that the ATP-PC manages.
