The Study
Six weeks of time-restricted eating improves basal fat oxidation and body composition but not fat oxidation during exercise in young males.
This study gave one group of guys a new eating schedule and another group kept eating normally, then measured what changed. Because they randomly assigned who got which plan, we can say the eating schedule probably caused the fat loss—not just that people who ate this way happened to be thinner.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study tested if eating only between noon and 8 p.m. for six weeks helps people burn more fat while resting.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 560 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Losing 1.4 kg of fat and burning more fat at rest is meaningful for metabolic health, but not changing fat burning during exercise means the effect is limited to rest.
- 2People who ate only during an 8-hour window lost 2.8 kg of weight, 1.4 kg of fat, and 1.7% body fat.
- 3Their bodies burned more fat at rest by 0.33 mg per kg of muscle per minute.
- 4But they didn't burn more fat while cycling, and their blood sugar and cholesterol didn't change.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Clinical nutrition
Year
2025
Authors
H. Aktas, M. Atakan, Selin Aktitiz, Zeynep Ergün, Ş. Koşar, Todd A. Astorino, H. H. Turnagöl
Related Content
Claims (4)
Eating over a long window keeps insulin levels high, while eating within a short window causes insulin levels to drop, allowing the body to burn fat.
In healthy young men, following a 16:8 time-restricted eating pattern for six weeks does not change fasting blood glucose, insulin, triglycerides, total cholesterol, or HDL cholesterol levels, even though body fat decreases and fat burning at rest increases.
In healthy young men aged approximately 27.5 years, following a 16:8 time-restricted eating pattern for six weeks results in a reduction of body mass by 2.8 kg, fat mass by 1.4 kg, and body fat percentage by 1.7%, while increasing the rate of fat burned at rest and lowering the respiratory exchange ratio.
After six weeks of eating only during an 8-hour window each day, healthy young men burn the same amount of fat during a moderate bike ride at 40% of their maximum capacity, but they burn more fat while at rest.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.