In adults with obesity, 12 weeks of eating only during an 8-hour window did not significantly change resting calorie burn.
See the scientific wording
In adults with obesity, 12 weeks of 8-hour time-restricted feeding (daily eating window of 8 hours) was not associated with a statistically significant change in resting metabolic rate; mean resting metabolic rate was 1431 ± 62 kcal/day at baseline and 1318 ± 61 kcal/day at week 12. The change was not statistically significant. Absolute mean values are reported; no relative effect size or risk estimate was reported.
Indication only — weak evidence
ObservationalOne low-scoring study points this way, but the evidence is still early.
What the research says
1 study reviewedSupporting (1)
Safety of 8-h Time Restricted Feeding in Adults with Obesity (FS18-05-19).
Cohort StudyHuman
The abstract reports that resting metabolic rate did not change over time across baseline, week 1, and week 12 despite a numerical decrease. This supports the safety claim that 8-hour time-restricted feeding does not negatively impact resting metabolic rate in this sample.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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In adults with obesity, 12 weeks of eating only during an 8-hour window did not significantly change resting calorie burn.
Mechanism
1 studyEvidence from Studies
Supporting (1)
Community contributions welcome
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review and Meta-Analysis of Randomized Trials of Time-Restricted Feeding on Resting Metabolic Rate in Adults with Obesity
Systematic search and meta-analysis of RCTs in adults with obesity comparing 8-hour time-restricted feeding for at least 12 weeks versus unrestricted eating or standard diet, with resting metabolic rate measured at baseline and week 12; pooled mean difference and 95% confidence interval.
Randomized Controlled Trial of 12-Week 8-Hour Time-Restricted Feeding vs Normal Eating on Resting Metabolic Rate in Adults with Obesity
Double-arm parallel RCT in adults with obesity: intervention 8-hour daily time-restricted feeding for 12 weeks versus control with habitual eating window; primary outcome change in resting metabolic rate measured by indirect calorimetry at baseline and week 12; powered for between-group difference.
Prospective Cohort Study of 8-Hour Time-Restricted Feeding and 12-Week Change in Resting Metabolic Rate in Adults with Obesity
Prospective cohort of adults with obesity who self-select 8-hour time-restricted feeding versus no time restriction, with resting metabolic rate measured at baseline and week 12; adjust for baseline RMR, weight change, physical activity, and diet.
Cross-Sectional Comparison of Resting Metabolic Rate in Adults with Obesity Who Practice 8-Hour Time-Restricted Feeding vs Those Who Do Not
Cross-sectional study measuring resting metabolic rate in adults with obesity stratified by current 8-hour time-restricted feeding practice; assess association with RMR while adjusting for age, sex, weight, and medication.
Animal Model Study of 8-Hour Time-Restricted Feeding and Resting Metabolic Rate in Diet-Induced Obese Rodents
Randomized controlled animal study in diet-induced obese mice or rats: 8-hour time-restricted feeding versus ad libitum access for 12 weeks; measure resting metabolic rate via indirect calorimetry, body composition, and energy expenditure.