- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03969745
Effects of Two-weeks of Time Restricted Feeding on Basal and Postprandial Metabolism in Healthy Men (TRF)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
All participants were monitored for a one week baseline period to establish their habitual physical activity and dietary patterns. This was done using food diaries, interstitial glucose monitors and a combined heart rate + accelerometer device. Participants consumed a standardised evening meal ~12h before visiting the laboratory to assess their metabolic response to a liquid test meal (1g/kg bodyweight dextrose and 0.4g/kg bodyweight protein) using the arterio-venous forearm balance model. Dual-energy X-ray absorptiometry scans, indirect calorimetry measurements and fasted and postprandial vastus lateralis biopsies were also obtained.
From the next day, participants either restricted their daily energy intake window to between 8 am and 4 pm or were prescribed a caloric deficit diet (~400 kilocalories/day) for two weeks. Physical activity, interstitial glucose concentrations and dietary patterns were monitored throughout. After this, participants visited the laboratory again to assess changes in metabolism and body composition.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Nottingham, United Kingdom, NG7 2UH
- MRC/ARUK Centre for Musculoskeletal Ageing, School of Life Sciences, University of Nottingham
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Healthy male between 18 and 35 years old
- Body mass index between 18 and 27.5 kg.m^-2
- Regular breakfast consumer, 5 or more days per week
- Moderate physical activity level (PAL between 1.6 and 2)
Exclusion Criteria:
- Smoking
- Any metabolic (e.g. diabetes), endocrine (e.g. hyperthyroidism) or cardiovascular (heart or blood) abnormalities including hypertension.
- Clinically significant abnormalities on screening including ECG abnormalities
- Routine medication that may alter cardiovascular function and blood flow (e.g. blood pressure-lowering drugs or drugs that cause hypertension)
- High alcohol consumption (Routinely >4 units per day)
- Eating attitudes test (EAT-26) score > 20
- On an energy-restricted diet
- Significant body mass fluctuation in previous 3 months (>5%)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Time restricted feeding (TRF)
Participants restricted their daily energy intake window to between 8 am and 4 pm for two weeks.
They were encouraged to not alter the quantity and composition of their diet or alter physical activity patterns.
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Restrict energy intake window to between 8am and 4pm
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Active Comparator: Caloric deficit
The investigators observed significant weight loss in the TRF group with participants reporting to consume ~400 kilocalories less per day.
Therefore the investigators added a caloric deficit group to control for the effects of weight loss on metabolism.
Total energy expenditure was measured for one week and was used to prescribe a 400 kilocalories/day energy deficit diet to follow for two weeks.
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Follow a prescribed daily energy deficit of 400 kilocalories without altering nutrient timing
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in glucose uptake
Time Frame: Pre and post intervention (15 days apart). Fasted blood samples and every 10 min for 3 hours following consumption of carbohydrate + protein drink
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The arterio-venous forearm balance method was used to assess skeletal muscle glucose uptake in micromoles/min.
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Pre and post intervention (15 days apart). Fasted blood samples and every 10 min for 3 hours following consumption of carbohydrate + protein drink
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Change in branched chain amino acid uptake
Time Frame: Pre and post intervention (15 days apart). Fasted blood samples and every 10 min for 3 hours following consumption of carbohydrate + protein drink
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The arterio-venous forearm balance method was used to assess skeletal muscle branched chain amino acid uptake in micromoles/min.
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Pre and post intervention (15 days apart). Fasted blood samples and every 10 min for 3 hours following consumption of carbohydrate + protein drink
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Change in whole-body insulin sensitivity
Time Frame: Pre and post intervention (15 days apart).
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The Matsuda Index was used to calculate an index of whole-body insulin sensitivity using values of fasted and postprandial glucose and insulin.
Measured in arbitrary units and higher values indicates increased insulin sensitivity.
All individual changes will be reported.
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Pre and post intervention (15 days apart).
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in body composition
Time Frame: Pre and post intervention (15 days apart)
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Dual-energy X-ray absorptiometry scans to assess changes in fat mass in kg
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Pre and post intervention (15 days apart)
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Change in body composition
Time Frame: Pre and post intervention (15 days apart)
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Dual-energy X-ray absorptiometry scans to assess changes in fat-free mass in kg
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Pre and post intervention (15 days apart)
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Change in substrate metabolism
Time Frame: Pre and post intervention (15 days apart). In each condition there was one measurement in the fasted state and two measurements in the postprandial state.
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Rates of oxygen consumption and carbon dioxide production were measured using indirect calorimetry.
These were used to calculate rates of fat and carbohydrate metabolism in grams/min.
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Pre and post intervention (15 days apart). In each condition there was one measurement in the fasted state and two measurements in the postprandial state.
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Kostas Tsintzas, PhD, University of Nottingham
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 19-1705
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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