NCT07096505

The Effects of Early vs. Delayed Time-Restricted Eating on Metabolic Syndrome Parameters

The Effects of Early vs. Delayed Time-Restricted Eating on Metabolic Syndrome Parameters in Obese Women: A Randomized Controlled Trial

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 36 (actual)
• Sponsor: SINEM BAYRAM · Academic / Other
• Sex: Female
• Age: 20 Years – 49 Years
• Healthy volunteers: Accepted

Summary

This study aims to compare the effects of early and delayed time-restricted eating on metabolic syndrome parameters in obese women.

Detailed description

This randomized controlled trial investigates the effects of time-restricted eating with different timing windows on metabolic syndrome parameters. A total of 36 sedentary obese women aged between 20-49 years were randomly assigned to one of three groups: Early Time-Restricted Eating (eTRE; 08:00-16:00), Delayed Time-Restricted Eating (dTRE; 12:00-20:00), and a Control group (08:00-20:00). Participants' physical activity levels were assessed using a one-day physical activity log. Total energy expenditure was calculated, and a 25% energy restriction was applied to create individualized medical nutrition therapy. Anthropometric measurements, body composition, and biochemical parameters were collected before and after the 8-week intervention.

Conditions

• Obesity and Metabolic Syndrome

Interventions

Type	Name	Description
BEHAVIORAL	Early time restricted eating with calorie restriction	Participants followed a diet with 25% energy restriction and an 8-hour eating window from 08:00 to 16:00. Dietary compliance was monitored by dietitian through food consumption records.
BEHAVIORAL	Delayed Time Restricted Eating with calorie restriction	Participants followed a diet with 25% energy restriction and an 8-hour eating window from 12:00 to 20:00. Dietary compliance was monitored by dietitian through food consumption records.
BEHAVIORAL	Control group with calorie restriction	Participants followed a diet with 25% energy restriction and a usual eating window from 08:00 to 20:00. Dietary compliance was monitored by dietitian through food consumption records.

Timeline

• Start date: 2023-07-21
• Primary completion: 2024-10-15
• Completion: 2024-12-15
• First posted: 2025-07-31
• Last updated: 2025-07-31

Locations

1 site across 1 country: Turkey (Türkiye)