Question 1

How is Total Daily Energy Expenditure (TDEE) determined?

Accepted Answer

TDEE combines your Basal Metabolic Rate (BMR)—the baseline energy needed to sustain vital organs at complete rest—multiplied by a physical activity multiplier covering occupational exertion, structured exercise, non-exercise activity thermogenesis (NEAT), and the thermic effect of food (TEF).

Question 2

What is a clinically safe and sustainable caloric deficit for fat loss?

Accepted Answer

A moderate deficit of 300 to 500 kcal per day (approximately 15–20% below your maintenance TDEE) produces steady, sustainable fat loss of 0.5 to 1.0 lb per week while preserving lean muscle tissue and preventing hormonal downregulation.

Question 3

What are the absolute minimum safe caloric intake thresholds?

Accepted Answer

Clinical dietary consensus recommends not consuming below 1,200 kcal/day for adult females or 1,500 kcal/day for adult males without physician supervision, in order to avoid micronutrient deficiencies, gallstones, and metabolic fatigue.

Question 4

How does providing body fat percentage improve calorie accuracy via Katch-McArdle?

Accepted Answer

When body fat percentage is provided, the engine calculates Lean Body Mass (LBM) using the Katch-McArdle formula. Since muscle is far more metabolically active than fat mass, this yields significantly higher precision for both lean muscular athletes and individuals with higher body fat.

Question 5

What macronutrient ratio should accompany a caloric deficit?

Accepted Answer

During caloric restriction, consuming 1.6 to 2.2 grams of protein per kilogram of body weight (0.7–1.0 g/lb) provides muscle-sparing nitrogen balance, while remaining calories are split between essential dietary fats (20–30%) and complex carbohydrates to fuel workouts.

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