What happens after weight loss and how to maintain the results

Weight loss and weight maintenance are two different tasks, and the latter is more difficult. After losing weight, the body burns less energy than expected for its new mass, and this shift can persist for years. The good news is that maintenance has been studied: we know what people who have succeeded do.

Why maintenance is a separate task

The most striking measurements were taken from participants in a television weight loss project. Six years after the competition, they still exhibited metabolic adaptation: resting energy expenditure remained lower than predicted by their new body mass, and most participants had regained a significant portion of their weight by that time.

This is an extreme case—a very rapid and large weight shift—but the trend is typical. Regain is also seen in controlled studies: in the POUNDS LOST trial, participants on all four diets lost an average of about 6 kg by the sixth month and began to regain weight after the twelfth.

The conclusion to draw from this is that a plan to "reach the goal" without a plan for "what comes next" is only half the work.

What successful maintainers do

The largest source of data on maintenance is the American registry of people who have maintained significant weight loss for years. A review of its data describes a set of common traits: participants maintain a high level of daily activity, eat breakfast regularly, monitor their nutrition, and weigh themselves frequently.

An important caveat: this is an observation of those who succeeded, not an experiment. It shows what successful people do, but it does not prove that these specific actions caused the result. How to distinguish between the two is covered in our article on reading nutrition research.

What works mechanically

1. Regular self-monitoring. In a review of self-monitoring studies, consistency in tracking was associated with better outcomes, regardless of the format: diary, app, or scale.
2. Protein and food volume. These help maintain satiety at a lower caloric intake; guidelines can be found in our article on protein intake.
3. Strength training. This protects muscle mass, which influences resting energy expenditure.
4. Gradual transition to maintenance. Returning to previous caloric intake in one step is the most common scenario for failure: the body is already burning less than it was before the weight loss.
5. The corridor rule instead of a target. A range of a couple of kilograms, where you return to more careful tracking if you exceed the upper limit, works better than a single number.

What not to do

Suddenly return to your previous diet. Energy expenditure after weight loss is lower than it was at the same weight previously; your old diet will result in a surplus.

Consider regain a failure. Regaining some weight is a typical part of the process, not a personal defeat; the data above highlights exactly this.

Maintain a strict deficit indefinitely. The weight loss phase is intended to be finite; attempting to make it permanent ends in failure more often than in results.

Focus on the morning number. Fluctuations of a kilogram are normal, as discussed in our article on daily weight fluctuations.

How the transition to maintenance looks

In practice, this looks like this: caloric intake is increased in steps of 100–150 kcal per week, while monitoring the average weekly weight. As long as the average stays within the corridor, you can continue adding; as soon as it starts to rise for three weeks in a row, you stop at the previous step.

This takes anywhere from a few weeks to a couple of months, and it is a normal part of the process, not a "prolonged diet." How to calculate maintenance calories is covered in our article on daily calorie requirements, and what to do if weight loss stalls early is in our article on plateaus.

Count it from a photo

Frequently asked questions

Why does weight return after weight loss?

Energy expenditure after weight loss remains lower than predicted by the new body mass: in participants of a television project, this adaptation persisted after six years. The previous diet at a reduced expenditure results in a surplus.

What do people who have managed to maintain their weight do?

According to the American registry, they maintain high daily activity, eat breakfast regularly, monitor their nutrition, and weigh themselves frequently. This is an observation of successful cases, not proof of causality.

How to transition from a deficit to maintenance?

In steps: add 100–150 kcal per week and monitor the average weight for the week. If the average increases for three consecutive weeks, return to the previous step.

Is it necessary to continue counting calories after weight loss?

Not necessarily to the same extent, but some form of self-monitoring helps: in a review of studies, consistency in tracking was associated with better outcomes regardless of the format.

What to do if the weight starts to return?

Return to more careful tracking for a few weeks without imposing a severe deficit. Regaining some weight is a typical scenario, and it is better to react to it early and gently than late and abruptly.

Read next

• Weight loss plateau: why weight stalls and what to do about it — The weight has stayed at the same number for the third week in a row, even though the diet hasn't changed — and the first instinct is usually the same: to cut even more.
• Calorie deficit: how to calculate it and how to hold it — A calorie deficit is the one thing without which weight does not come down.
• Why weight changes by a kilogram in a day — Fat cannot be gained overnight: a kilogram of adipose tissue is thousands of kilocalories that cannot be acquired in eight hours of sleep.

This article is for general information. It is not medical advice, a diagnosis, or a prescription for treatment or a diet, and it does not replace a consultation with your doctor. If you have a health condition, are pregnant, take medication, or follow a diet prescribed to you, decisions about food belong with your doctor.

Figures from regulations, guidelines and studies are given as they stood when this article was prepared and may since have changed; check them against the primary sources. This article is not advertising, an offer, or individual advice, and neither the author nor the site owner is responsible for decisions taken on the basis of it.