Nutrition for Different Activities

Nutritional requirements vary depending on the type, intensity and duration of physical activity. For Edexcel GCSE PE, you must understand how athletes adjust their diet before, during and after exercise, what carbohydrate loading is, and how specific sports require different nutritional strategies.

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Pre-Event Nutrition

Pre-event nutrition is what an athlete eats in the hours before competition or training. The goal is to ensure glycogen stores are full, hydration is optimal, and the stomach is not uncomfortably full.

Timing	Recommendation	Reason
3–4 hours before	Eat a full meal rich in complex carbohydrates with moderate protein and low fat	Allows time for digestion; tops up glycogen stores
1–2 hours before	Eat a light snack — e.g. a banana, toast with honey, energy bar	Provides a final energy boost without causing discomfort
30 minutes before	Drink water (200–400 ml); avoid large meals	Ensures hydration; food would cause stomach cramps

Ideal pre-event meal: Pasta with a tomato-based sauce, rice with chicken, porridge with fruit.

Foods to avoid before exercise:

• High-fat foods (slow to digest; divert blood away from muscles)
• High-fibre foods (can cause bloating and gastrointestinal distress)
• Sugary foods too close to start (may cause a blood sugar spike and crash)

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During-Event Nutrition

Nutritional needs during exercise depend on the duration and intensity of the activity:

Duration	Nutritional Need	Practical Example
Under 30 minutes	Water only	Sprint events, short gym sessions
30–60 minutes	Water; possibly isotonic sports drink	Football half, tennis set
60–90 minutes	Isotonic drink for fluid + electrolytes + carbohydrates	Full football match, long gym session
Over 90 minutes	Isotonic drink + easily digestible carbohydrates (gels, bars, bananas)	Marathon, cycling road race, Ironman triathlon

graph LR
    A["< 30 min"] -->|"Water"| B["Short Events"]
    C["30-60 min"] -->|"Water / Isotonic"| D["Moderate Events"]
    E["60-90 min"] -->|"Isotonic Drink"| F["Full Match"]
    G["> 90 min"] -->|"Isotonic + Carbs"| H["Endurance Events"]
    style A fill:#c8e6c9,stroke:#2e7d32
    style C fill:#fff9c4,stroke:#f9a825
    style E fill:#ffe0b2,stroke:#e65100
    style G fill:#ffcdd2,stroke:#c62828

Exam Tip: When discussing nutrition during exercise, always relate it to the duration and type of activity. A sprinter does not need to eat during a 10-second race, but a marathon runner needs regular fuel throughout.

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Post-Event Nutrition

Post-event nutrition is what an athlete eats after exercise. The goal is to recover — replenish glycogen stores, repair muscle damage, and rehydrate.

Timing	Recommendation	Reason
Within 30 minutes	Consume a snack with carbohydrates and protein (e.g. chocolate milk, protein shake with banana)	The "recovery window" — the body absorbs nutrients most efficiently immediately after exercise
Within 2 hours	Eat a full meal with complex carbohydrates, lean protein and vegetables	Replenishes glycogen stores and provides amino acids for muscle repair
Ongoing	Continue to drink water or electrolyte drinks	Replaces fluids lost through sweating

The 3 Rs of Recovery:

1. Refuel — replace glycogen with carbohydrates
2. Repair — provide protein for muscle repair
3. Rehydrate — replace fluids and electrolytes

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Carbohydrate Loading