Describe the main functions of the three macronutrients and how requirements for each differ between endurance and power athletes. (3 marks)
--- 9 WORK AREA LINES (style=lined) ---
Show Answers Only
Answers could include three of the following:
- Carbohydrates are stored as glycogen and are the main fuel source for the aerobic and glycolytic energy systems. Endurance athletes need a much higher daily intake to sustain prolonged activity.
- Power athletes rely mainly on the ATP-PCr system for short, explosive efforts. Their carbohydrate needs are lower, but intake still supports training volume and recovery.
- Fats are stored as triglycerides and supply energy during prolonged, lower-intensity exercise. They make a greater contribution for endurance athletes than for power athletes.
- Protein repairs and rebuilds muscle tissue. Power athletes such as weightlifters have higher requirements to support muscle growth and strength adaptation, while endurance athletes need protein mainly for tissue repair.
Show Worked Solution
Answers could include three of the following:
- Carbohydrates are stored as glycogen and are the main fuel source for the aerobic and glycolytic energy systems. Endurance athletes need a much higher daily intake to sustain prolonged activity.
- Power athletes rely mainly on the ATP-PCr system for short, explosive efforts. Their carbohydrate needs are lower, but intake still supports training volume and recovery.
- Fats are stored as triglycerides and supply energy during prolonged, lower-intensity exercise. They make a greater contribution for endurance athletes than for power athletes.
- Protein repairs and rebuilds muscle tissue. Power athletes such as weightlifters have higher requirements to support muscle growth and strength adaptation, while endurance athletes need protein mainly for tissue repair.