Understanding Total Daily Energy Expenditure (TDEE)
Your Total Daily Energy Expenditure (TDEE) is the cumulative number of Calories your body burns over a 24-hour cycle. It represents your exact caloric break-even point: consume this amount of food energy, and your body weight remains perfectly stable.
BMR (~60-70%)
Basal Metabolism
Energy required to sustain vital organ homeostasis (heart, lungs, brain, cellular turnover) at complete rest.
NEAT (~15%)
Non-Exercise Activity
Calories burned through everyday physical motion: walking, pacing, chores, posture, and fidgeting.
TEF (~10%)
Thermic Effect of Food
Metabolic cost of mastication, peristalsis, and nutrient digestion. Highest for dietary protein (20-30%).
EAT (~5-15%)
Exercise Thermogenesis
Voluntary high-intensity resistance training, cardio, cycling, and organized sport sessions.
How to Apply TDEE for Body Composition
- Fat Loss (Cutting): Establish an intentional deficit of 20% (approx. 500 kcal/day). Since 1 pound of adipose tissue stores roughly 3,500 kcal, a 500 kcal daily deficit translates to 1 lb (0.45 kg) of fat loss per week without compromising hormonal equilibrium.
- Muscle Growth (Bulking): For natural trainees, an energy surplus of 200 to 400 kcal/day paired with progressive resistance overload optimizes muscle protein synthesis while keeping extraneous fat accrual to a minimum.