Compare and contrast how the ATP-PCr and Glycolytic energy systems respond to high intensity exercise. (4 marks)
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Sample Answer
Similarities:
- Both systems operate anaerobically, providing ATP without oxygen during maximal efforts.
- Both support high-intensity exercise when oxygen cannot meet demands.
Differences:
- ATP-PCr activates instantly for 10-15 seconds while glycolytic takes time to reach peak output.
- ATP-PCr produces harmless creatine whereas glycolytic generates performance-limiting lactic acid.
- Recovery differs greatly: PCr replenishes rapidly within minutes versus much longer for lactic acid clearance.
- ATP-PCr suits explosive single efforts like jumps while glycolytic sustains repeated high-intensity work for 30-90 seconds.
- Training targets different adaptations: PCr storage capacity versus lactate tolerance.
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Sample Answer
Similarities:
- Both systems operate anaerobically, providing ATP without oxygen during maximal efforts.
- Both support high-intensity exercise when oxygen cannot meet demands.
Differences:
- ATP-PCr activates instantly for 10-15 seconds while glycolytic takes time to reach peak output.
- ATP-PCr produces harmless creatine whereas glycolytic generates performance-limiting lactic acid.
- Recovery differs greatly: PCr replenishes rapidly within minutes versus much longer for lactic acid clearance.
- ATP-PCr suits explosive single efforts like jumps while glycolytic sustains repeated high-intensity work for 30-90 seconds.
- Training targets different adaptations: PCr storage capacity versus lactate tolerance.