Ending a diet without the yo-yo effect: what comes next

When is a diet over?

A diet is a planned phase with a start and an end. It shouldn't simply keep running until your motivation is used up. Four signals suggest it is time to end it:

• Goal reached: You have reached the goal you planned for.
• Losing more brings little: Further losses would do more harm than good.
• Performance suffers: Your training and performance are getting noticeably worse.
• Daily life gets harder: Hunger, energy or everyday life are suffering over a longer period.

The decision shouldn't hinge on a single day's reading. Look at how your weight, performance and daily life have developed over several weeks. Not every extra kilo lost brings you closer to what you actually want.

Why the scale goes up first after a diet

When you eat more again, especially more carbohydrates, your body refills its glycogen stores in the muscles and liver. Glycogen is stored together with water, at roughly three to four parts water to one part glycogen (Kreitzman et al., 1992). On top of that comes more salt and more food in your gut from bigger portions.

A sample calculation to give you a sense of scale: if your stores fill up by 300 g of glycogen, three to four parts water bring 1.2 to 1.5 kg onto the scale. This happens within a few days and it isn't fat. To gain a kilo of fat in the same time, you would need a surplus of several thousand kilocalories.

It helps to know this in advance. If you panic at the first increase and cut back straight away, it is easy to end up in a cycle of restricting and giving in. How to tell water and fat apart is covered in the article Weight going up in a calorie deficit: water or fat?

Calculating your new maintenance level

After a diet, your maintenance needs are lower than before, if only because you weigh less. So recalculate them with your current weight, for example in the calorie calculator. The value “Total expenditure” is your estimated maintenance level.

An example: a 32-year-old woman, 168 cm, lightly active, training three times a week, started at 72 kg (159 lb) and is eating 1,650 kcal at the end of her diet. At her current 66 kg (146 lb), the calculator shows a total expenditure of 1,974 kcal. That is her new target, about 320 kcal more than during the diet.

Expect the real value to be a little lower. People who maintain a lower body weight often burn 10 to 15% less energy than their fat and muscle mass alone would predict. This applies to lean people and people with overweight alike, and it is called adaptive thermogenesis (Rosenbaum and Leibel, 2010). So the calculated value is a target you check against your trend, not a fixed number.

Step by step: the first four weeks

Instead of eating 320 kcal more overnight, you spread the difference over three to four weeks. In the example, that is about 80 kcal more each week:

The steps don't have to be exactly the same size. What matters is the direction. If your weekly average stays stable for two to three weeks after the first increase, the level is right. If it keeps rising, stay one step lower. If it keeps falling, you can add a little more.

Two mistakes are typical: going straight back to eating the way you did before the diet, or still being stuck at diet calories six weeks later out of fear of losing your result. The first brings big swings and uncertainty, the second brings restriction for no reason.

Reverse dieting: what the evidence shows and what it doesn't

“Reverse dieting” means raising your calories after a diet in small steps over many weeks. The idea is that your metabolism recovers while you gain hardly any fat. That sounds plausible, but the evidence is thin.

A review on metabolic adaptation to weight loss describes reverse dieting as a method that became known mainly through anecdotal reports, and notes that its effectiveness still needs to be studied (Trexler et al., 2014). The first randomised study on it has so far only been published as a preliminary analysis (Rodriguez Da Silva et al., 2025). 49 adults who did strength training lost 5% of their body weight and then followed one of three strategies for 15 weeks. The reverse diet group regained 3.7% on average, the group that went straight back to their calculated maintenance 2.7%, and the group without any guidelines 1.3%. The differences were not statistically significant, so the study showed no advantage for reverse dieting.

What follows from this? I still think raising calories step by step makes sense, but for practical reasons: you see how your weight responds to each step, and you get used to bigger portions without losing track. Increasing in tiny steps over months, on the other hand, has no proven benefit based on what we know today. Mostly, it extends the time in which you eat less than you need.

What keeps the weight off after a diet

After weight loss, your body works against the lower weight: your energy expenditure drops and you feel less full. More than 80% of people return to their previous body fat after successfully losing weight (Rosenbaum and Leibel, 2010). Whether that happens depends less on the transition than on what you keep doing afterwards:

• Keep training: don't suddenly cut back a lot just because the diet is over.
• Weekly trend, not daily readings: checking the average once a week is enough.
• Keep the structure, loosen the strictness: a rough weekly structure instead of weighing every gram.
• Plan for exceptions: plan restaurant meals or celebrations on purpose and shape the rest of the week around them.

Many thoughts in this phase feel true but don't hold up. “If I eat more, I'll gain weight straight away”: short-term fluctuations are water. “One normal day will ruin my result”: a single day changes nothing in the long run.

When to go back to a diet, a building phase or recomposition

The maintenance phase has no fixed end date. A new active phase makes sense when three things come together: a clearly defined new goal, maintenance that has been running steadily for several months, and enough energy and motivation for a new structured phase.

If you want to lose more weight, set the new deficit based on your current maintenance level, not on your last diet. How big it should be is explained in the article How big should your calorie deficit be? For a building phase, you increase calories and training volume gradually from maintenance. And whether it is worth building muscle while losing a bit more fat at the same time is covered in the article on body recomposition.

None of these signals is a must, and maintenance can also be permanent. For many people, holding the new weight is how the earlier work pays off.