Impact of Intermittent Fasting on Sleep and Quality of Life

The goal of this clinical trial is to investigate the impact of intermittent fasting on sleep, quality of life and fatigue among healthy volunteers. The main questions aim to answer: Whether intermittent fasting would allow participants to experience an improvement in their sleep quality, duration and latency? Whether intermittent fasting would ameliorate participants' quality of life and reduce chronic fatigue symptoms? Researchers will compare the two most prevailing fasting windows of intermittent diet including an early morning feeding window (8 a.m.-4 p.m.) and a late feeding window (12 p.m.-8 p.m.) to see if there is a difference among these feeding windows on sleep and quality of life. Participants will: * Be divided into two groups (group A and group B) that will alternate their fasting windows. * Group A will start with intermittent fasting over a feeding period from 12 p.m. to 8 p.m. for one month, then a two weeks period of usual eating habits (washout period) and finally one month of intermittent fasting with a feeding period from 8 a.m. to 4 p.m. * Group B will follow intermittent fasting over a feeding period from 8 a.m. to 4 p.m for one month, then a two weeks period of usual eating habits (washout period) and finally one month of intermittent fasting with a feeding period from 12 p.m. to 8 p.m. * At enrollment, at the end of each month of intermittent fasting and at the end of washout period participants will be asked to complete some questionnaires and will be submitted to anthropometric measurements using impedance scales. * Participants will be asked to complete an electronic 24 hour recall diary using the Automated Self-Administered 24h Dietary Assessment (ASA24) Tool software once per week every week during study.

NCT Number	NCT06959069
Lead Sponsor	Université Libre de Bruxelles
Conditions	Sleep Quality, Quality of Life, Fatigue, Intermittent Fasting
Enrollment	36 participants
Start Date	2025-03-17
Primary Completion	2026-05-30 (estimated)
Study Completion	2026-08-30 (estimated)
Updated on ClinicalTrials.gov	2025-05-06