Impact of Intermittent Fasting on Sleep and Quality of Life

Sponsor
Université Libre de Bruxelles
Study ID
NCT06959069
Status
Recruiting
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Conditions

  • Fatigue
  • Intermittent Fasting
  • Quality of Life
  • Sleep Quality

Eligibility Criteria

Sex
ALL
Age
18 Years - 65 Years
Healthy Volunteers
Accepted

Interventions

  • Intermittent Fasting - Late feeding window — OTHER
    Intermittent fasting is an eating pattern that consists of alternating periods of fasting of varying duration with periods of eating. In the present study, all participants will follow a time-restricted feeding/eating (TRF/E) that restricts all dietary intake to an 8- hour daily eating window. There will be two different feeding periods. The first window will allow a feeding period from12 p.m. to 8 p.m. (late feeding window).
  • Intermittent Fasting - Early feeding window — OTHER
    Intermittent fasting is an eating pattern that consists of alternating periods of fasting of varying duration with periods of eating. In the present study, all participants will follow a time-restricted feeding/eating (TRF/E) that restricts all dietary intake to an 8- hour daily eating window. There will be two different feeding periods. The second window will allow a feeding period from 8 a.m. to 4 p.m (early feeding window).

Study Details

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.

Key Dates

First listed
May 6, 2025
Start date
Mar 17, 2025
Status verified
Apr 2025
Primary completion
May 30, 2026
Completion
Aug 30, 2026

Study Design

Enrollment
36 participants (estimated)
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
SUPPORTIVE_CARE

Arms

  • Active Comparator: Intermittent Fasting - Group A
    Group A will follow intermittent fasting over a feeding period from 12 p.m. to 8 p.m. (known as late feeding window) for one month, then a two weeks period (washout period) that participants will return to their usual eating habits and finally one month of intermittent fasting with a feeding period from 8 a.m. to 4 p.m (early feeding window).
  • Active Comparator: Intermittent Fasting - Group B
    Group B will follow intermittent fasting over a feeding period from 8 a.m. to 4 p.m (early feeding window) for one month, then a two weeks period (washout period) that participants will return to their usual eating habits and finally one month of intermittent fasting with a feeding period from 12 p.m. to 8 p.m. (known as late feeding window).

Primary Outcome Measure

Impact of intermittent fasting on sleep [ Time Frame: In total 4 times: at baseline assessment (day 1), at the end of the first month of intermittent fasting (day 28), at the end of the washout period (day 42), at the end of second month of intermittent fasting (day 70) ]

Central Contacts

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