Evaluate how an athlete's macronutrient requirements change when transitioning from aerobic to anaerobic training. (8 marks)
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Sample Answer
- Carbohydrate needs shift from complex carbohydrates during endurance work to readily available simple carbohydrates required for anaerobic energy production
- Protein requirements increase from 1.2g/kg to 1.6-1.8g/kg to support greater muscle fibre recruitment and repair during explosive movements
- Fat utilisation decreases during anaerobic training as the body prioritises glucose metabolism, reducing dietary fat requirements for immediate energy
- Timing of nutrient intake becomes critical, requiring precise pre-workout fueling and immediate post-workout recovery within the anabolic window
- Pre-exercise meal focuses on lower fibre, higher simple carbohydrates to prevent digestive issues while ensuring quick energy for intensity
- Recovery nutrition emphasises rapid glycogen replenishment using high GI carbohydrates as anaerobic training depletes stores more quickly
- Hydration needs adjust during anaerobic work due to higher core temperature and sweat rates, requiring strategic electrolyte replacement
- Supplement considerations shift toward creatine and BCAAs for power rather than endurance-focused supplements used in aerobic training
Show Worked Solution
Sample Answer
- Carbohydrate needs shift from complex carbohydrates during endurance work to readily available simple carbohydrates required for anaerobic energy production
- Protein requirements increase from 1.2g/kg to 1.6-1.8g/kg to support greater muscle fibre recruitment and repair during explosive movements
- Fat utilisation decreases during anaerobic training as the body prioritises glucose metabolism, reducing dietary fat requirements for immediate energy
- Timing of nutrient intake becomes critical, requiring precise pre-workout fueling and immediate post-workout recovery within the anabolic window
- Pre-exercise meal focuses on lower fibre, higher simple carbohydrates to prevent digestive issues while ensuring quick energy for intensity
- Recovery nutrition emphasises rapid glycogen replenishment using high GI carbohydrates as anaerobic training depletes stores more quickly
- Hydration needs adjust during anaerobic work due to higher core temperature and sweat rates, requiring strategic electrolyte replacement
- Supplement considerations shift toward creatine and BCAAs for power rather than endurance-focused supplements used in aerobic training