Understanding Your TDEE: The Foundation of Smart Nutrition

Before you can make meaningful progress — whether your goal is fat loss, muscle gain, or simply feeling better — you need to understand how much energy your body actually uses each day. That number is your Total Daily Energy Expenditure, or TDEE.

What is TDEE?

TDEE is the total number of calories your body burns in a 24 hour period. It includes everything: keeping your heart beating, breathing, digesting food, walking to the kitchen, and your gym session. It is made up of four components: Basal Metabolic Rate (BMR), the Thermic Effect of Food (TEF), Non Exercise Activity Thermogenesis (NEAT), and Exercise Activity Thermogenesis (EAT).

How Helic Calculates It

Helic uses the Mifflin St Jeor equation — widely regarded as the most accurate formula for estimating BMR — combined with your stated activity level. We then apply a goal based adjustment: a calorie deficit for fat loss, a surplus for muscle gain, or maintenance for body recomposition.

• Sedentary (little or no exercise): BMR × 1.2
• Lightly active (1–3 days/week): BMR × 1.375
• Moderately active (3–5 days/week): BMR × 1.55
• Very active (6–7 days/week): BMR × 1.725
• Extra active (physical job + training): BMR × 1.9

Why It Matters

Without an accurate TDEE estimate, calorie targets are guesswork. Eating too far below your TDEE can cause muscle loss, fatigue, and metabolic adaptation. Eating too far above it leads to unwanted fat gain. A well calibrated TDEE gives you the baseline to make informed, sustainable choices.

Consistency beats perfection. A plan you can follow 80% of the time will outperform a perfect plan you can only follow for two weeks.

Your TDEE is not fixed. It changes as your weight, muscle mass, and activity levels change. That is why Helic recalculates your targets whenever you update your profile — keeping your plan accurate as you progress.