Meal Timings, Appetite, Mood and Weight Loss in Individuals on a Commercial Intermittent Fasting Programme

NCT04893772 | Completed

• 1 other identifier: DASMA_KCL
• Study Type: observational
• Target: 33
• Locations: 1 country
• Sites: 1

Brief Summary

Although individuals following commercial intermittent fasting programmes consume meal replacement products during fasting days, further behavioural variables such as time of food consumption, sleep quality and duration, appetite and mood may significantly impact weight loss and intervention success. This project aims to assess behavioural patterns (dietary intake, sleep, meal timing, physical activity), mood and appetite on both fasting and non-fasting days and to investigate whether these are associated with weight loss.

Conditions

Weight Loss

Outcome Measures

Primary Outcomes (1)

• Body weight in kg

  Weighed at home

  Change in body weight up to 12 weeks

Secondary Outcomes (29)

• Sleep duration

  Before weight loss programme (day 0)

• Sleep quality

  Before weight loss programme (day 0)

• Physical activity

  Before weight loss programme (day 0)

• Meal timings

  Before weight loss programme (day 0)

• How hungry do you feel?

  Daily from day 1 up to 12 weeks

Interventions

Intermittent fasting DIETARY_SUPPLEMENT

Three "fasting" days a week, whereby participants consume 600-800 kcal/day from 4 meal replacement products: breakfast, lunch, a snack and dinner. During the other 4 non-fasting "smart" days each week, participants are instructed to consume 2 x 300 kcal meals and 2 x 100 kcal snacks, from a selection of recipes, plus one meal of their own choosing.

Also known as: LighterLife Fast

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Adults embarking on a commerical intermittent fasting weight loss programme

You may qualify if:

• Those responding to adverts on the LighterLife Fast Challenge social media channels will be asked if they would like to participate

You may not qualify if:

• Those without access to a smart phone or laptop will not be eligible to take part in the study due to the need to report variables daily

Sponsors & Collaborators

• King's College London: lead
• LighterLife (UK) Ltd: collaborator

Study Sites (1)

Department of Nutritional Sciences, King's College London

London, United Kingdom

Location

MeSH Terms

Conditions

Weight Loss

Condition Hierarchy (Ancestors)

Body Weight Changes; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: May 12, 2021
• First Posted: May 20, 2021
• Study Start: June 30, 2021
• Primary Completion: October 31, 2021
• Study Completion: December 31, 2021
• Last Updated: April 19, 2023

Record last verified: 2021-05

Data Sharing

• IPD Sharing: Will not share

Locations

GB (1)