Effects of intermittent fasting on sleep and quality of life

Impact of Intermittent Fasting on Sleep and Quality of Life Among Healthy Adults

NA · Université Libre de Bruxelles · NCT06959069

This study is testing if different schedules of intermittent fasting can improve sleep quality and overall well-being in healthy volunteers.

Quick facts

PhaseNA
Study typeInterventional
Enrollment36 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorUniversité Libre de Bruxelles (other)
Locations1 site (Brussels)
Trial IDNCT06959069 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates how intermittent fasting influences sleep quality, quality of life, and fatigue among healthy volunteers. Participants will be divided into two groups, alternating between two different fasting windows: an early morning feeding window (8 a.m. to 4 p.m.) and a late feeding window (12 p.m. to 8 p.m.). The study will assess changes in sleep metrics and quality of life using validated questionnaires over a 10-week period. Researchers aim to determine if one fasting window is more beneficial than the other in improving these outcomes.

Who should consider this trial

Good fit: Ideal candidates are healthy adults aged 18 to 65 with a BMI between 18.5 and 29.9.

Not a fit: Patients with existing sleep disorders, significant medical conditions, or those who are underweight or obese may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide insights into dietary strategies that enhance sleep quality and overall well-being.

How similar studies have performed: While intermittent fasting has been explored in various contexts, this specific comparison of feeding windows on sleep and quality of life is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Healthy subjects
* Adult subjects - age: between 18 and 65 years old
* Subjects with a BMI between 18.5 and 29.9 kg/m\^2
* Male and female subjects

Exclusion Criteria:

* Subjects \< 18 years old
* Subjects with Diabetes Mellitus (type 1 and type 2)
* Pregnant and/or breastfeeding and/or postpartum women
* Underweight subjects (BMI \< 18.5)
* Obese subjects (BMI \> 30)
* Subjects with confirmed sleep disorders (requiring CPAP or sleep medication (sleeping pills))
* Subjects with renal failure (GFR \< 30 ml/min/1.73 m\^2) or liver disorder
* Subjects with serious cardiovascular, respiratory, neurological, or metabolic medical conditions
* Subjects with malignant tumors
* Subjects with a serious mental disorder requiring medication (e.g., antidepressants or anxiolytics)
* Subjects with eating disorders
* Subjects who have undergone major surgery or have been hospitalized due to major medical condition (surgery, stay in intensive care) within the last one year
* Subjects who have lost more than 10% of their body weight within the last one year
* Subjects actively participating in a weight-loss program
* Subjects with alcohol use disorder (maximum 10 standard alcoholic drinks per week, 2 standard alcoholic drinks per day)
* Subjects with substance use disorder
* Subjects unable to provide informed consent
* Subjects who do not participate simultaneously in another clinical trial

Where this trial is running

Brussels

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Sleep Quality, Quality of Life, Fatigue, Intermittent Fasting, intermittent fasting, sleep, quality of life, fatigue

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.