Refeeds, diet breaks and reverse dieting: a pause can help. The rest is mostly gym folklore.
Planned breaks from dieting are supposed to stop your metabolism from slowing down. The evidence is small, mixed and more interesting than the hype. Reverse dieting has barely been tested at all.
The short version
- What it is
- Refeeds: a day or two of eating more (mostly carbs) during a diet. Diet breaks: a week or two eating at maintenance. Reverse dieting: slowly adding calories back after a diet.
- Good for
- Making a long diet feel less brutal. Possibly less hunger.
- Bad at
- "Resetting your metabolism". And reverse dieting is close to untested.
- Evidence
- Weak. A couple of decent trials with mixed results.
- Our take
- Breaks can make dieting bearable. We do something similar with Rebel Day, for fun, not fat loss.
What refeeds and diet breaks actually are
These all come from the bodybuilding world, where people diet hard for months before a show.
- Refeed: one or two days of higher calories, mostly from carbohydrate, every week or so during a diet.
- Diet break: one to two weeks eating at maintenance (enough to keep your weight stable), then back to the diet.
- Reverse dieting: after a long diet, adding calories back very slowly, say 50–100 kcal a week, with the idea of "rebuilding" your metabolism without gaining fat.
Scientists group the first two under "intermittent energy restriction": dieting in blocks, with planned stops in between.3
How it works in your body
When you diet, your body adapts. You burn a little less energy than your new weight would predict, hunger hormones rise, and the body gets more efficient. Researchers call this metabolic adaptation, and it slows fat loss and nudges you towards regain.4
The idea behind breaks: short periods back at energy balance might temporarily undo some of that adaptation, so when you diet again, it works better.3 It's a reasonable theory. Whether it actually happens in people is the question.
Metabolic adaptation is real. In a famous follow-up of contestants from the TV show The Biggest Loser, their resting metabolism was still about 500 kcal a day lower than expected six years later.5 Extreme weight loss, tiny study, but it shows the body keeps score.
What you eat, what you don't
Eat (on a break or refeed)
- Normal-sized meals, built on protein and vegetables
- More carbs: rice, potatoes, oats, wholegrain bread, fruit
- The same protein as during the diet
- Your usual foods, just more of them
Forget it
- Turning a refeed into a cheat day with pizza and doughnuts
- "I'm on a break" as a week-long all-you-can-eat pass
- Soft drinks and sweets because "carbs are allowed"
- Weighing yourself every morning during a break (water weight will go up)
A refeed day and a break week, in real life
A refeed isn't a buffet. It's a normal day with the carbs turned up and the fat kept fairly low, so the extra food is mostly the stuff your muscles can actually store. Something like:
- Breakfast: a big bowl of oats with banana and a spoon of yoghurt, coffee as usual.
- Lunch: chicken or tofu, a proper plate of rice, vegetables, and a piece of fruit after.
- Snack: two slices of wholegrain bread with honey or jam, or a couple of rice cakes.
- Dinner: fish or lean meat with potatoes or pasta, a salad, and a small dessert if you want one.
Protein stays the same as on your diet days. What changes is the amount of rice, potatoes, bread and fruit. A break week is even less exciting: your normal meals at portions that keep your weight steady. No tracking marathon, no "use it or lose it" eating. If you need a rough guide, it's about what you ate before you started dieting.
In Singapore: refeeds fit hawker food easily. Chicken rice (steamed chicken, skip the skin), fish soup with rice or thick bee hoon, yong tau foo with a side of rice, economy rice with two vegetables and one protein. The traps are fried dishes that pass as "carbs": char kway teow, fried carrot cake, roti prata with curry. They come with a lot of oil, and fat isn't what a refeed is for.
In Austria, Germany and Switzerland: boiled potatoes, wholegrain or rye bread, Bircher muesli, rice dishes and pasta with tomato sauce all work. The traps wear a carb costume: Schnitzel with fries, Käsespätzle, Kaiserschmarrn and bakery pastries are as much butter and oil as flour.
Alcohol on refeeds and diet breaks
OK, now and then
- A glass of wine or a beer with a meal on a break week
- A spirit with soda water and lime
- Alcohol-free beer
Not a refeed
- A refeed made of beer
- Drinking away the "extra" calories
- Cocktails and sugary mixers
50 Club: one drink with dinner on a break week.
Alcohol isn't the carbohydrate a refeed is supposed to be about. Your muscles can't store it. All the details are in our alcohol guide.
What it's good for, with proof
The trial that says yes: MATADOR
In an Australian trial, 51 men with obesity either dieted continuously for 16 weeks, or dieted in two-week blocks alternating with two weeks at maintenance (30 weeks in total, same 16 weeks of dieting). Among those who completed it, the break group lost more: 14.1 kg against 9.1 kg, mostly fat, and kept more of it off afterwards.1 The break weeks themselves caused almost no weight gain. Caveat: it took nearly twice as long, and it was a small study.
The trial that says not really: ICECAP
In 61 resistance-trained adults, dieting with one-week breaks every three weeks didn't lead to more fat loss or more muscle kept than dieting continuously. But the break group reported less hunger and less desire to eat.2 So in lean, trained people, the physical benefit didn't show up. The mental one did.
The uncomfortable truth
"A refeed day resets your metabolism." There's no good evidence that a single high-carb day does that. Reviews of bodybuilding prep describe refeeds as having a theoretical rationale but being understudied.6 Mostly, a refeed is a nice day.
"Reverse dieting lets you eat more without gaining fat." It's popular online and in coaching. It has essentially no controlled trials behind it. Adding food slowly after a diet is sensible to keep things steady, but the claim that it "builds up" your metabolism is unproven. Your weight will go up a bit as glycogen and water return. That's not failure.
The risks
- Break becomes binge. For some people, permission to eat more turns into a week of eating everything, undoing weeks of work.
- Endless dieting. Breaks can make it easier to stay "on a diet" for years. That's not the goal.
- Eating disorders. Cycles of restriction and planned overeating can feed disordered eating.
- Scale panic. Weight goes up on a refeed from water and glycogen. Expect it.
Allergies: watch the staples
| Refeed staple | Allergen (EU list of 14)7 | Swap |
|---|---|---|
| Oats, pasta, bread, bagels | Cereals containing gluten | Rice, potatoes, quinoa |
| Pancakes, waffles | Cereals containing gluten, eggs, milk | Rice porridge, potato pancakes without egg |
| Greek yoghurt with granola | Milk, often tree nuts | Soy yoghurt with fruit |
| Rice cakes with peanut butter | Peanuts | Rice cakes with honey or seed butter |
Don't do refeeds or diet breaks if you…
- have ever had an eating disorder, or binge after restricting
- are pregnant or breastfeeding
- are under 18
- have diabetes and take insulin (carb swings need planning)
Healthen me asks about all of these and gives you a different plan if any apply.
How we use refeeds and diet breaks in your plan
We don't, at least not in the gym sense. Refeeds, diet breaks and reverse dieting are information only.
Our version of a planned break is Rebel Day: a day to eat what you like, birthday cake included, followed by a fasting day (or a lightest-food day if you can't fast). It isn't there to trick your metabolism. It's there because a plan you can live with beats a perfect one you quit. If you train hard and want to explore cycles, read about bulking and cutting.
This article is general information, not medical advice. If you have a medical condition or take medication, talk to your doctor before changing how you eat.
Sources
- Byrne NM et al. Intermittent energy restriction improves weight loss efficiency in obese men: the MATADOR study. International Journal of Obesity 2018;42(2):129–138. doi.org/10.1038/ijo.2017.206
- Peos JJ et al. Continuous versus intermittent dieting for fat loss and fat-free mass retention in resistance-trained adults: the ICECAP trial. Medicine & Science in Sports & Exercise 2021;53(8):1685–1698. doi.org/10.1249/MSS.0000000000002636
- Peos JJ et al. Intermittent dieting: theoretical considerations for the athlete. Sports 2019;7(1):22. doi.org/10.3390/sports7010022
- Trexler ET, Smith-Ryan AE, Norton LE. Metabolic adaptation to weight loss: implications for the athlete. Journal of the International Society of Sports Nutrition 2014;11(1):7. doi.org/10.1186/1550-2783-11-7
- Fothergill E et al. Persistent metabolic adaptation 6 years after “The Biggest Loser” competition. Obesity 2016;24(8):1612–1619. doi.org/10.1002/oby.21538
- Helms ER, Aragon AA, Fitschen PJ. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. Journal of the International Society of Sports Nutrition 2014;11:20. doi.org/10.1186/1550-2783-11-20
- Regulation (EU) No 1169/2011 on food information to consumers, Annex II (the 14 allergens). eur-lex.europa.eu/eli/reg/2011/1169/oj