Explain why timing of nutrient intake differs for a weightlifter versus a marathon runner. (3 marks)
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Sample Answer
- Weightlifters need protein within 1-2 hours post-exercise because explosive lifting causes muscle damage requiring immediate repair.
- Marathon runners require carbohydrate loading 2-4 days before events due to their need for maximised glycogen stores lasting 90+ minutes.
- This difference occurs because weightlifters use the ATP-PCr system for brief efforts, whereas marathon runners rely on the aerobic system which depends on sustained glycogen availability.
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Sample Answer
- Weightlifters need protein within 1-2 hours post-exercise because explosive lifting causes muscle damage requiring immediate repair.
- Marathon runners require carbohydrate loading 2-4 days before events due to their need for maximised glycogen stores lasting 90+ minutes.
- This difference occurs because weightlifters use the ATP-PCr system for brief efforts, whereas marathon runners rely on the aerobic system which depends on sustained glycogen availability.