CALCULATOR

Diet Break Calculator

Whether you are due a break from dieting, how long it should be, and what to expect on the scale when you take one.

Diet break plan

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When to take a diet break

A diet break means eating at maintenance for a defined period, typically one to two weeks, in the middle of a longer fat loss phase. It is not a cheat week and it is not abandoning the diet.

The rationale is partly physiological and largely practical. Extended restriction produces adaptive reductions in expenditure, rising hunger hormones, declining training quality and accumulating psychological fatigue. Periodic maintenance periods address several of these at once.

The MATADOR study compared continuous dieting with two-week alternating blocks of dieting and maintenance, and found the intermittent group retained more fat loss and showed less reduction in energy expenditure. Evidence is not extensive, but the approach is low risk and adherence benefits are commonly reported.

Frequently asked questions

How often should I take a diet break?

Common practice is every eight to twelve weeks of dieting, or sooner if hunger, sleep or training quality deteriorate.

Will I regain fat during a break?

Scale weight rises by roughly one to two kilograms from glycogen, water and food volume. That is not fat and it disappears when you resume.

What should I eat on a diet break?

Maintenance calories with protein held at your normal target. Most of the increase comes from carbohydrate.

Is a diet break the same as a refeed?

No. A refeed is one or two higher-carbohydrate days; a break is one to two weeks at full maintenance.

Sources

Byrne NM et al. Intermittent energy restriction improves weight loss efficiency in obese men: the MATADOR study. International Journal of Obesity, 2018.
Peos JJ et al. Intermittent Dieting: Theoretical Considerations for the Athlete. Sports, 2019.
Trexler ET, Smith-Ryan AE, Norton LE. Metabolic adaptation to weight loss: implications for the athlete. JISSN, 2014.
National Institutes of Health, Office of Dietary Supplements. Nutrient fact sheets. ods.od.nih.gov
NHS. Nutrition and health guidance. nhs.uk
US Departments of Agriculture and Health and Human Services. Dietary Guidelines for Americans, 2025-2030. dietaryguidelines.gov

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General information, not medical advice. Consult a qualified professional before changing your diet, especially with a medical condition.