TDEE Calculator for Bodybuilders: How to Eat for Maximum Muscle
Bodybuilding nutrition starts with your TDEE. During a bulk, you need a controlled surplus of 300–500 kcal above your TDEE to maximise muscle protein synthesis while minimising fat gain. Training at high intensity 4–6 days per week places you firmly in the 'very active' category. Use this number as the anchor for your entire nutrition plan.
Bodybuilders have unique calorie needs that change dramatically between bulking and cutting phases. During a bulk, you need a surplus of 300 to 500 calories above your TDEE, focused on gaining muscle while minimising fat. During a cut, a deficit of 300 to 500 calories helps shed fat while preserving hard earned muscle. The Mifflin St Jeor equation used here gives a solid baseline, but bodybuilders with above average muscle mass may want to use the Katch McArdle formula, which factors in lean body mass. Protein intake should stay high in both phases, at least 2 grams per kilogram of body weight, with higher intake during cuts to protect muscle from breakdown.
- During a bulk, aim for a 300 to 500 calorie surplus. More than that adds unnecessary fat without speeding up muscle growth.
- During a cut, keep protein at 2.2 to 2.6 grams per kilogram. Higher protein during a deficit preserves more muscle mass.
- If you know your body fat percentage, consider using the Katch McArdle formula instead. It accounts for lean mass and is more accurate for muscular physiques.
- Weigh yourself daily and calculate weekly averages. A gain of 0.25 to 0.5 kg per week during a bulk and a loss of 0.5 to 1 percent body weight per week during a cut are optimal rates.
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