Effects of Aerobic Exercise on Gut Microbiota

Study Overview
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Brief Summary
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In the present study, we seek to elucidate the effects of aerobic exercise on fecal microbiota following the aforementioned no exercise control group and two doses of aerobic exercise training (the exercise training spans  24 wks) in a cross-sectional sample.

Detailed Description
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We will collect ancillary data for the ongoing Examination of Mechanisms of exercise-induced weight compensation (E-Mechanic; RCT; Martin CK and Church TS Co-PI's; R01 HL 102166) to investigate the independent aim and hypothesis of this pilot and feasibility (P & F) grant examining if there are differences in colonic microbial populations from a fecal sample following supervised and controlled aerobic exercise. The proposed study seeks to better understand the role of colonic microbial populations as a mechanism of change in body weight during aerobic exercise. E-Mechanic is examining the effects of 2 tightly controlled and supervised doses of aerobic exercise, and a no-exercise control group, on energy balance and body weight over 24 wks in overweight and obese persons. The two aerobic exercise doses were: 1) 8 kcal/kg of body weight/week (KKW) ( 900 kcal/wk) and 2) 20 KKW ( 2250 kcal/wk) compared to a no exercise control group. The low dose of exercise (8 KKW) represents the American College of Sports Medicine (ACSM) recommendation for overall health and the higher dose (20 KKW) the recommendation for weight loss and weight loss maintenance. Aim 1 To investigate if colonic bacterial populations differ between the exercise groups and the healthy living control group following aerobic exercise. It is hypothesized that participants in the exercise group will have different bacterial populations than those in the healthy living control group.

Official Title
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Effects of Aerobic Exercise on Gut Microbiota (EGM) - P & F Ancillary Study (E-Mechanic)

Conditions
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Gut Microbiota

Intervention / Treatment
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* Behavioral: Aerobic Exercise


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Participants are overweight or obese (BMI 25 ≥ kg/m2 and ≤ 45 kg/m2), not actively exercising > 20 min on ≥ 3 days/wk, weight stable, non-diabetic, non-smoker, and not have any major medical disorders including such as HIV, CVD, mental illness

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: No Exercise Control<br>Healthy Living Control Group | |
| Experimental: Aerobic Exercise Group<br>8 kcal/kg of body weight/week (KKW) ( 900 kcal/wk) | Behavioral: Aerobic Exercise<br>* The exercise expenditure goals were calculated by multiplying the participants' body weight by the exercise dose (8 or 20 KKW) divided by the number of sessions (3-5 sessions/wk). The speed and grade were monitored and documented to keep participant heart rate at 65-85% of tested VO2 peak and entered into ACSM equations for energy expenditure.<br>|
| Experimental: Aerobic Exercise Group 2<br>20 KKW ( 2250 kcal/wk) | Behavioral: Aerobic Exercise<br>* The exercise expenditure goals were calculated by multiplying the participants' body weight by the exercise dose (8 or 20 KKW) divided by the number of sessions (3-5 sessions/wk). The speed and grade were monitored and documented to keep participant heart rate at 65-85% of tested VO2 peak and entered into ACSM equations for energy expenditure.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Gut Microbiota |  | 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Gut Microbiota