Why a calorie deficit stops working
It doesn't. What changes is how much you burn and how much you actually eat — and both changes happen unnoticed by you.
5 min read
Two things that shift quietly
The first: expenditure drops with weight loss. The body has become lighter, and the same movements require less energy. Additionally, spontaneous activity decreases — a person walks less, gesticulates less, sits longer. This is not laziness or weak willpower; this is physiology, and it is not noticeable to the naked eye.
The second: unaccounted food increases. Oil in the pan, a couple of spoonfuls to 'taste,' juice, a handful of nuts. Studies using direct measurement of expenditure consistently show that people underestimate what they eat by a third — and they do so sincerely.
What to do about it
Do not deepen the deficit. A deficit deeper than a quarter of total expenditure begins to consume muscle along with fat, and that is precisely the tissue that maintains expenditure. Instead — recalculate your target for the new weight and restore tracking accuracy.
A practical approach
- A deficit of about twenty percent of expenditure — approximately half a kilogram per week.
- Protein at two grams per kilogram of body weight: in a deficit, it protects muscles from breakdown.
- Strength training not for burning calories, but for preserving muscle.
- Recalculation of the target for every five kilograms lost.
This is not medical advice. If you have pain or a medical condition, a doctor decides your workout load, not an app — and we'll tell you directly when that's the case.