Time-restricted eating is feasible for firefighters on 24-hour shifts, resulting in a reduction of daily eating window from 14.1 hours to 11.1 hours and adherence to a 10-hour eating window on approximately 5–6 days per week without adverse effects.

When eating is limited to a consistent 10-hour window each day, the body's internal clock resets to match the daily cycle of light and activity. This reset improves how the liver, muscles, and fat tissue handle sugar and fat, reduces stress on the heart and blood vessels, and calms the nervous system. These changes make the body feel more balanced and less stressed, so people can stick to the eating schedule without feeling unwell.