Research

Energy balance

Short-term weekly intermittent energy restriction (IER) produces weight loss equivalent to continuous energy restriction (CER) in adults with overweight or obesity, making it a viable alternative treatment option.

If you struggle with daily calorie counting, try a weekly intermittent energy restriction plan where you restrict calories (420-1500 kcal) for 2-3 days a week (or in 7-day cycles) and eat normally otherwise. This approach yields the same weight loss as daily restriction over 3-6 months. However, be aware that long-term maintenance is not guaranteed by the diet alone; you likely need active weight maintenance strategies after the intervention ends.

ModerateSupportsLOW confidence
Meta-analysis demonstrated no significant difference in weight loss between weekly intermittent energy restriction and continuous energy restriction post-intervention (weighted mean difference: -1.36 [-3.23, 0.51], p = 0.15)... The findings support the use of weekly intermittent energy restriction as an alternative option for the treatment of obesity.
Leanne Harris et al. · Obesity Reviews · 2017

Why this rating

The review included only 5 RCTs with low overall quality evidence (GRADE assessment) and high risk of bias in several domains.

Source

Short‐term intermittent energy restriction interventions for weight management: a systematic review and meta‐analysis

Leanne Harris et al. · Obesity Reviews · 2017

DOI 10.1111/obr.12593

Meta-analysis · 5 studiesCited 64×
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DOI resolved against Crossref · corpus check 2026-06-10

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