Pre-Workout Nutrition: What to Eat Before Exercise

Why Pre-Workout Nutrition Matters

Your muscles rely on glycogen — stored carbohydrate — as the primary fuel source for moderate-to-high-intensity exercise. When glycogen stores are low, muscle contraction speed and strength output decline, perceived effort increases, and training quality deteriorates. Pre-workout nutrition addresses this by topping up liver and muscle glycogen before the session begins.

Protein consumed before training also contributes to muscle protein synthesis during and after the session — the amino acids are available in the bloodstream when training-induced MPS is elevated. Research by Tipton et al. demonstrated that pre-exercise protein ingestion produces a comparable anabolic response to post-exercise protein, suggesting the pre-workout window is nutritionally relevant for muscle adaptation.

Fat and fibre slow gastric emptying — which is why pre-workout meals are typically lower in fat and fibre than other meals. Excessive fat or fibre close to training can cause gastrointestinal discomfort and delay fuel availability.

Optimal Pre-Workout Meal Timing

The closer to your workout, the smaller and simpler the meal should be. The general timing framework:

What to Eat Before a Workout: Meal Examples

2–3 Hours Before Training (Full Meal)

This window allows enough time to digest a complete meal without GI discomfort. The goal is to provide sustained carbohydrate availability throughout the session plus protein for the pre-workout anabolic stimulus. Keep fat below 15–20 g to avoid slowing digestion.

• Chicken breast + white rice + steamed vegetables
• Oats with Greek yoghurt and banana
• Sweet potato + lean ground turkey + salad
• Pasta with lean meat sauce (small-to-medium portion)
• Rice cakes with cottage cheese and fruit

60–90 Minutes Before Training (Light Snack)

• Banana with 1 tbsp peanut butter
• Greek yoghurt with berries
• Protein shake + 1 piece of fruit
• 2 rice cakes with a small serving of turkey

30 Minutes or Less (Quick Fuel)

• 1 ripe banana
• Sports drink or diluted fruit juice
• White bread with honey (1–2 slices)
• Energy gel (for endurance athletes)

Based on: Thomas DT, Erdman KA, Burke LM. "Nutrition and Athletic Performance." J Acad Nutr Diet. 2016;116(3):501–528. PubMed

Fasted Training: Pros, Cons, and Who It Works For

Training in a fasted state — typically after an overnight fast or within an intermittent fasting window — is popular, but the evidence is mixed. Key findings from the research:

• Fat oxidation increases during fasted exercise — but total fat loss over 24 hours is not significantly different from fed training when calories are matched
• Performance may decline at high intensities (>75% VO₂max) due to lower glycogen availability — this matters more for strength training and HIIT than steady-state cardio
• Muscle protein breakdown increases during fasted resistance training — consuming a fast-digesting protein source (whey shake, BCAA) before the session substantially mitigates this
• Low-intensity cardio fasted (below 65% VO₂max) is generally well-tolerated with minimal performance cost

Bottom line: Fasted training is viable for low-to-moderate intensity sessions and for individuals who genuinely cannot tolerate food before training. For strength, power, or high-intensity sessions, fed training consistently outperforms fasted training for both performance and muscle retention.