Compare how carbohydrates and fats contribute to energy production during a marathon. (5 marks)
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Sample Answer
Similarities:
- Both carbohydrates and fats
-
- Fuel the aerobic energy system during the marathon.
- Contribute to ATP production for sustained movement.
- Are broken down through aerobic metabolism requiring oxygen.
- Work together throughout the event with changing ratios.
Differences:
- Carbohydrates provide immediate energy throughout the marathon while fats release energy more slowly.
- Carbohydrates are the primary fuel at higher intensities whereas fats dominate at lower intensities.
- Carbohydrate stores deplete after extended running while fat stores remain abundant throughout.
- Carbohydrates provide less energy per gram while fats provide more concentrated energy.
- Carbohydrates support varying pace changes while fats cannot meet rapid energy demands.
Key Relationship:
- As marathon pace increases, carbohydrate usage increases while fat usage decreases.
- After prolonged running, fat becomes increasingly important as carbohydrate stores deplete.
Show Worked Solution
Sample Answer
Similarities:
- Both carbohydrates and fats
-
- Fuel the aerobic energy system during the marathon.
- Contribute to ATP production for sustained movement.
- Are broken down through aerobic metabolism requiring oxygen.
- Work together throughout the event with changing ratios.
Differences:
- Carbohydrates provide immediate energy throughout the marathon while fats release energy more slowly.
- Carbohydrates are the primary fuel at higher intensities whereas fats dominate at lower intensities.
- Carbohydrate stores deplete after extended running while fat stores remain abundant throughout.
- Carbohydrates provide less energy per gram while fats provide more concentrated energy.
- Carbohydrates support varying pace changes while fats cannot meet rapid energy demands.
Key Relationship:
- As marathon pace increases, carbohydrate usage increases while fat usage decreases.
- After prolonged running, fat becomes increasingly important as carbohydrate stores deplete.