- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04931836
The Influence of Physical Activity on the Gut Microbiome of Pre-Diabetic Adults
April 2, 2024 updated by: University of Minnesota
The present study is a 100-participant randomized controlled 2-arm parallel trial that employs a metagenomic approach to examine how 8 weeks of supervised moderate-intensity treadmill walking exercise (MWE) for 30-45 min 3 times/week alters the gut microbiome, serum short chain fatty acids, and the cardiometabolic profile, body weight, and body composition of individuals 30-64 years old who have overweight or obesity and have prediabetes.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
All eligible and consented participants will complete a 3-week run-in phase during which baseline outcome assessments will be performed.
During run-in weeks 1 and 2, participants will wear a Fitbit Inspire 2 smartwatch and complete three unannounced dietary recalls.
During the run-in week 3 (see table below), participants will consume their 3-day standardized meal plan on days three through five, obtain a fecal sample, complete a study questionnaire, and complete a study assessment visit.
To quantify compliance with the 3-day meal plan, participants will be provided with a paper checklist of all foods to be consumed, and will be asked to indicate which foods were consumed and to document any deviation.
The study assessment visit will include a fasting blood draw (at baseline and week eight only), blood pressure in triplicate, weight measure and body fat assessment in duplicate, and a saliva sample.
Study Type
Interventional
Enrollment (Actual)
132
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Ryan Demmer, PhD
- Phone Number: 612-626-8597
- Email: demm0009@umn.edu
Study Locations
-
-
Minnesota
-
Minneapolis, Minnesota, United States, 55455
- University of Minnesota
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
30 years to 64 years (Adult)
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Classified as overweight or obese with BMI 25.0-39.9 kg/m2.
- Documentation* of a prediabetes diagnosis within one year of enrollment by physician or primary care provider based on lab tests showing a fasted blood glucose of 100-125 mg/dL, a 2-hour oral glucose tolerance test of 140-199 mg/dL, or an HbA1c level of 5.7%-6.4%76; OR a study screening lab value of HbA1C within the afore mentioned range.
- Currently engaged in <100 min/week of physical activity - confirmed by questionnaire.
- No exercise contraindications as assessed by the Physical Activity Readiness Questionnaire (PAR-Q)78-this Questionnaire involves seven "yes" or "no" questions regarding an individual's health status, with answering "yes" to any one of these questions requiring a prospective participant to acquire a written doctor's note stating they can safely participate in the trial's exercise intervention.
- No self-reported physical/mental disabilities or gastrointestinal conditions.
- No antibiotic usage within the last 45 days.
- Stable weight over the last 6 months (<10% change).
- Not currently pregnant, planning to become pregnant, or currently breastfeeding.
Willing to maintain current dietary and exercise habits, aside from any changes to be made per the study exercise protocol.
- Note: Documentation can include either a print out or screen shot of the lab value illustrating eligibility, along with the date of the test and the participant's name. If a hard copy is provided, the date and name will be redacted.
Exclusion Criteria:
- Self-reported use of metformin and/or other medications that could interfere with the primary outcome.
- History of bariatric surgery or a history of other medical interventions that would interfere with the primary outcome.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Experimental Group
Participants in this group will complete the physical activity intervention.
|
Three walking sessions/week for a total of 8 weeks (24 total sessions) - Walking sessions will either take place on new commercial treadmills in the Epidemiology Clinical Research Center or remotely at or around a participant's home.
Regardless of the walking location, walking sessions will be 30 min in duration during intervention weeks 1 through 4 and a minimum of 45 min each during intervention weeks 5 through 8.
|
No Intervention: Control Group
Participants in this group will be asked to maintain their normal level of physical activity.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Shannon Index
Time Frame: 8 weeks
|
Changes to the gut microbiome will be assessed via metagenomic sequencing, from pre- to post-intervention.
The Shannon Index-a measure of microbial community diversity-will be the primary indicator for changes in gut microbiota composition, and will be assessed at baseline, and following the 4th and 8th weeks.
Index values are unitless and range from 0 to 1. Lower values indicate more diversity while higher values indicate less diversity.
Outcome will be reported at baseline, 4 weeks, and 8 weeks and as the change from baseline to 4 weeks and baseline to 8 weeks.
|
8 weeks
|
Chain in Serum Short Chain Fatty Acids (SCFA)
Time Frame: 8 weeks
|
Participants will undergo fasted blood draws to assess serum SCFA levels.
This work will be performed using the Metabolon pipeline.
Outcome is reported as the serum concentrations of acetate, propionate, and butyrate individually and sum of all SCFAs in units of ng/ml.
|
8 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
High-density lipoprotein cholesterol (HDL-C)
Time Frame: 8 weeks
|
High-density lipoprotein cholesterol (HDL-C) will be measured using standard laboratory test and report in units of mg/dl.
|
8 weeks
|
Triglycerides
Time Frame: 8 weeks
|
Blood triglycerides will be measured using a standard laboratory test and reported in units of mg/dl.
|
8 weeks
|
Fasting Insulin
Time Frame: 8 weeks
|
Fasting insulin will be measured by laboratory test and reported in units of uIU/ml.
|
8 weeks
|
Fasting Glucose
Time Frame: 8 weeks
|
Fasting insulin will be measured by standard laboratory test and reported in units of mg/dl.
|
8 weeks
|
C-reactive Protein (CRP)
Time Frame: 8 weeks
|
C-reactive protein (CRP) will be measured by laboratory test and reported in units of mg/l.
|
8 weeks
|
Resting Blood Pressure (BP)
Time Frame: 8 weeks
|
Resting systolic and diastolic blood pressures will be reported in units of mmHg.
|
8 weeks
|
Hemoglobin A1C (HbA1c)
Time Frame: 8 weeks
|
Hemoglobin A1C (HbA1c) will be measured by laboratory test.
This is a unitless measure.
|
8 weeks
|
Body Composition
Time Frame: 8 weeks
|
Body composition will be analyzed using bioelectrical impedance.
Outcome will be reported as percent body fat.
|
8 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Ryan Demmer, PhD, University of Minnesota
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
July 29, 2021
Primary Completion (Actual)
November 30, 2023
Study Completion (Actual)
November 30, 2023
Study Registration Dates
First Submitted
June 11, 2021
First Submitted That Met QC Criteria
June 11, 2021
First Posted (Actual)
June 18, 2021
Study Record Updates
Last Update Posted (Actual)
April 4, 2024
Last Update Submitted That Met QC Criteria
April 2, 2024
Last Verified
April 1, 2024
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- STUDY00009136
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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