Describe the role of carbohydrates in supporting the energy requirements of an endurance athlete. (3 marks)
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Sample Answer
- Carbohydrates are stored as glycogen in the muscles and liver. They provide the primary energy source for endurance exercise lasting beyond 90 minutes.
- Complex carbohydrates provide a sustained release of glucose into the bloodstream. This maintains blood glucose levels for consistent energy during prolonged physical activity.
- Carbohydrate loading before an endurance event maximises glycogen stores. This extends the time before depletion occurs, delaying fatigue and maintaining performance.
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Sample Answer
- Carbohydrates are stored as glycogen in the muscles and liver. They provide the primary energy source for endurance exercise lasting beyond 90 minutes.
- Complex carbohydrates provide a sustained release of glucose into the bloodstream. This maintains blood glucose levels for consistent energy during prolonged physical activity.
- Carbohydrate loading before an endurance event maximises glycogen stores. This extends the time before depletion occurs, delaying fatigue and maintaining performance.