Design and Implementation of a Time-Restricted Eating Intervention in a Randomized, Controlled Eating Study.

Area of Science:

• Nutrition Science
• Metabolic Health
• Obesity Research

Background:

• Previous research on time-restricted eating (TRE) for weight loss lacked controlled isocaloric designs.
• Establishing the efficacy of TRE requires studies that isolate meal timing effects from caloric intake.
• Prediabetes and obesity are significant public health concerns requiring effective weight management strategies.

Purpose of the Study:

• To describe the design and implementation of interventions in a controlled eating study evaluating TRE.
• To compare the effects of TRE versus a usual eating pattern (UEP) on weight change.
• To isolate the impact of meal timing on weight management under controlled dietary conditions.

Main Methods:

• A randomized, controlled, parallel-arm eating study was conducted.
• Participants (aged 21-69) with prediabetes and obesity were assigned to either TRE or UEP.
• The TRE group consumed 80% of calories by 1300 h, while the UEP group consumed ≥50% after 1700 h, with identical diets and calorie intake.

Main Results:

• The study successfully implemented interventions achieving the desired calorie distribution across eating windows.
• Adherence to macronutrient and micronutrient targets was maintained throughout the intervention period.
• Participant monitoring and dietary adaptations facilitated adherence to the prescribed eating patterns.

Conclusions:

• This study provides the first report on the design and implementation of interventions isolating meal timing effects.
• The methodology allowed for the evaluation of TRE's impact on weight while controlling for caloric intake and diet composition.
• Further research can build upon this controlled design to establish the efficacy of TRE for weight loss.