What to Eat During
Bodybuilding Competition Prep

Competition prep nutrition is not a crash diet. It is a structured, controlled reduction in energy that creates a caloric deficit large enough to lose body fat — and small enough to preserve the muscle underneath. Get that balance right and you step on stage full, hard, and conditioned. Get it wrong and you step on stage flat, depleted, and smaller than you were 20 weeks ago.

This guide covers the full nutrition framework — how to set calories, how to structure macros, what to eat, and how to adjust as prep progresses.

Setting Your Calories

The first number you need is your maintenance calorie intake — the amount of food that keeps your weight stable. Every athlete is different, but a reliable starting estimate is bodyweight in kg multiplied by 28–32, depending on your activity level. A 90kg athlete training 5 days per week might maintain at around 2,800–3,000 calories.

From maintenance, you create a deficit. For a natural or first-time prep, a deficit of 300–500 calories per day is the right starting point. This creates fat loss of approximately 0.3–0.5kg per week — slow enough to preserve muscle, fast enough to get you ready for a show.

Macro Setup

Once calories are set, the three macronutrients are distributed within that number.

Protein

Protein is the non-negotiable. In a caloric deficit, dietary protein is what protects existing muscle tissue from being broken down for energy. Keep it high throughout prep — 2.2–2.5g per kg of bodyweight is the minimum. Some athletes go higher. Going lower is a mistake.

Fats

Fats should not fall below 0.8g per kg of bodyweight. They regulate hormone production — including testosterone — and dropping too low compromises recovery, mood, and long-term health. Fat is often the first macro athletes cut when trying to reduce calories. This is backwards. Cut carbs first.

Carbohydrates

Carbs are the primary fuel for training and the primary driver of glycogen storage in muscle. In prep, carbs are the flexible macro — they go down as the deficit needs to increase. The goal is to keep them as high as possible while still losing fat. Low-carb approaches work but tend to cause more muscle loss, worse training performance, and harder recovery than a moderate-carb deficit approach.

What to Actually Eat

Food quality matters in prep — not because "clean" food has magical properties, but because high-volume, nutrient-dense foods keep you full on fewer calories and support recovery.

Protein sources

• Chicken breast — the prep staple. Low fat, high protein, versatile.
• White fish — cod, tilapia, sea bass. Very low calorie, high protein.
• Egg whites — excellent protein source, near-zero fat.
• Lean beef — higher fat than chicken but provides iron and creatine.
• Greek yoghurt — useful for hitting protein targets with variety.

Carbohydrate sources

• White rice — easy to digest, precise to measure, highly effective.
• Oats — good for earlier meals, provides sustained energy.
• White potato — filling, easy to prepare, good around training.
• Cream of rice — ideal for pre-training meals when digestion speed matters.

Fat sources

• Olive oil — easy to measure, anti-inflammatory.
• Avocado — whole food fat with good micronutrient profile.
• Whole eggs — balanced fat and protein source.
• Nuts — calorie-dense so portion control is important.

Meal Timing

The evidence on meal timing is less decisive than supplement companies would have you believe — but in practice, structure helps. Here is the framework I use:

• Pre-training: A carbohydrate and protein meal 60–90 minutes before training. This fuels the session and reduces muscle breakdown during training.
• Post-training: Protein and carbohydrates within 60 minutes of finishing. This is the highest-priority meal of the day for recovery and muscle retention.
• Remaining meals: Distribute protein evenly across the day — roughly every 3–4 hours. Research suggests protein synthesis is optimised when doses are spaced, not all consumed at once.

How to Adjust When Progress Stalls

Fat loss always slows. Metabolism adapts to a deficit over time — this is normal and expected, not a failure. When the scale stops moving for 2 weeks with no change in condition, it's time to adjust. The options, in order of preference:

1. Increase cardio — add 20–30 minutes of low-intensity cardio per week rather than cutting food further. Preserves muscle better than calorie reduction.
2. Reduce carbohydrates — drop carbs by 20–30g per day and reassess after 1–2 weeks.
3. Reduce fats slightly — only once carbs are already low. Never below the 0.8g per kg floor.

"The diet that gets you to stage isn't the diet you start with. It's the one you build over 20 weeks of honest feedback."

The Mistakes That Ruin Preps

• Starting too lean or too heavy. Ideal prep starting point for Men's Physique is roughly 10–13% body fat. Higher and prep becomes too long and too brutal. Lower and there's not enough muscle to show.
• Cutting protein when calories get low. Protein is the last macro to reduce. Always.
• Binge eating from extreme restriction. Too aggressive a deficit creates binge cycles that destroy weeks of progress. A moderate, sustainable deficit wins every time.
• Ignoring hunger signals completely. Extreme hunger is a signal that the deficit is too large. Manage it rather than just enduring it.
• Not tracking accurately. Eyeballing food portions is not prep. Weigh everything on a food scale, log it honestly. The margin for error in a 300-calorie deficit is very small.

Supplements Worth Using

Supplements are a small part of prep nutrition — the diet is the foundation. That said, a few are genuinely useful:

• Creatine monohydrate — 5g daily throughout prep. Supports strength retention in a deficit.
• Protein powder — a tool for hitting protein targets conveniently, not a meal replacement.
• Caffeine — useful pre-training, especially as calories drop and energy decreases.
• Vitamin D and omega-3 — support hormonal health and recovery throughout a long prep.