CrossFit Nutrition: Fuel High-Intensity Workouts

Master CrossFit nutrition with science-backed macro targets, pre- and post-WOD timing strategies, and hydration tips for peak WOD performance.

Frequently Asked Questions

What should I eat before a CrossFit workout?
Eat a mixed meal of carbohydrates and moderate protein 2–3 hours before your WOD — for example, rice with chicken, or oatmeal with Greek yogurt. Within 30–60 minutes of starting, choose easily digestible fast-acting carbs like a banana or a handful of dates. Avoid high-fat and high-fiber foods close to training, as they slow digestion and can cause discomfort during intense effort.
How many carbs do I need for CrossFit?
Most CrossFit athletes need 5–8 grams of carbohydrate per kilogram of body weight per day on hard training days. A 75 kg athlete, for example, requires 375–600 g of carbs daily. Research shows CrossFit athletes chronically under-consume carbohydrates, averaging only 3.3–3.9 g/kg — well below what sustained high-intensity performance demands.
How much protein do I need for CrossFit?
Aim for 1.6–2.2 grams of protein per kilogram of body weight per day. For a 75 kg athlete, that is approximately 120–165 grams of protein daily. Spread intake across 4–5 meals, targeting 25–40 grams per meal, to maximize muscle protein synthesis and support recovery between sessions.
What should I eat after a CrossFit workout?
Consume 20–40 grams of high-quality protein and 30–60 grams of fast-digesting carbohydrates within 30–45 minutes of finishing your WOD. Good options include a protein shake with a banana, Greek yogurt with fruit, or chocolate milk. This combination restores glycogen, triggers muscle protein synthesis, and prepares your body for the next session.
Is keto good for CrossFit performance?
The evidence is limited. A 2025 systematic scoping review found that high-carbohydrate diets consistently outperform ketogenic diets for CrossFit performance. Carbohydrates are the dominant fuel source for the high-intensity, glycolytic demands of a WOD. Keto may suit lower-intensity goals, but for competitive CrossFit, carbohydrates remain essential.
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