The Study
Feasibility of Time-Restricted Eating and Impacts on Cardiometabolic Health in 24-Hour Shift Workers: The Healthy Heroes Randomized Clinical Trial
This study is like a fair test where firefighters were randomly picked to either eat all their food in a 10-hour window or just eat normally. It found that those who ate in a shorter window sometimes had better blood numbers—but only if they already had health problems. It doesn’t prove eating this way will make anyone healthy, just that it might help some people who are already at risk.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Firefighters who ate only between 9 a.m. and 7 p.m. for 12 weeks saw better blood sugar, blood pressure, and fat levels — even without eating less food.
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 576 / 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.
- 1These changes are clinically meaningful — similar to improvements seen with diabetes or hypertension medications — and happened without dieting or losing weight.
- 2Firefighters with high blood sugar cut their HbA1c by 0.51%; those with high blood pressure cut diastolic pressure by 12.15 mmHg; and harmful fat particles (VLDL) shrank by 1.34 nm.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Cell metabolism
Year
2022
Authors
Emily N. C. Manoogian, Adena Zadourian, Hannah C. Lo, Nikko R Gutierrez, Azarin Shoghi, A. Rosander, Aryana Pazargadi, Cameron K. Ormiston, Xinran Wang, Jialu Sui, Zhaoyi Hou, J. Fleischer, S. Golshan, P. Taub, Satchidananda Panda
Related Content
Claims (6)
Among firefighters with high diastolic blood pressure, a 12-week time-restricted eating schedule lowered diastolic blood pressure by 12.15 mmHg, while blood pressure remained unchanged in those who did not follow the schedule.
In firefighters on 24-hour shifts, eating only within a 10-hour window for 12 weeks lowered the size of VLDL lipid particles by 1.34 nanometers compared to those eating a Mediterranean diet.
In firefighters with prediabetes, following a time-restricted eating schedule for 12 weeks lowered their glycated hemoglobin levels by 0.51% compared to those who did not change their eating patterns.
Firefighters on 24-hour shifts who followed time-restricted eating reduced their daily eating window from 14.1 hours to 11.1 hours and maintained a 10-hour eating window on 5 to 6 days per week without experiencing adverse effects.
Eating all meals within a daily time window improves metabolic function and gut health, even when total calories consumed remain unchanged.
Among firefighters with high fasting blood sugar, a 12-week time-restricted eating schedule lowered fasting blood sugar by 6.00 mg/dL and reduced a measure of insulin resistance by 0.49 compared to those who did not change their eating pattern.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.