TDEE for High Muscle Mass: Why Standard Formulas Underestimate Your Needs

The Mifflin-St Jeor formula estimates BMR from height, weight, age, and gender — but it doesn't account for unusually high muscle mass. Highly muscled athletes and bodybuilders have a higher metabolic rate per kg of bodyweight than average. The Katch-McArdle formula, which uses lean body mass, is more accurate in these cases. If you carry significantly above-average muscle, your true TDEE may be 10–15% higher than standard formulas predict.