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Exercise acutely increases gut permeability and inflammation, even in healthy populations. However, whether this response differs in groups at-risk for CVD that present with low-grade inflammation (e.g., normal-weight obesity) has yet to be examined. The investigators aim to measure serum indicators of gut permeability in those with normal-weight obesity pre- and post-short, intense exercise and sustained, moderate exercise
The investigator's overall goal is to examine how indicators of gut permeability change in response to exercise in individuals with normal-weight obesity (i.e., normal body mass index [BMI] and high body fat percent) relative to those with a normal BMI and low body fat percent and those with a BMI in the obesity range and high body fat percent.
The investigators will examine indicators of gut permeability (specified in primary outcomes) in response to a short, intense bout of exercise (i.e., VO2 max test on a cycle ergometer) and sustained, moderate bout of exercise (i.e., 45 minutes at 65% measured VO2 max on a cycle ergometer).
Additionally, the investigators will measure basic anthropometrics, blood lipids and glucose, and body composition with DXA.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Normal weight and low body fat percent | Active Comparator | The low risk comparator group for this study will consist of individuals with normal BMI (18.5 - 24.9 kg/m2) and body fat percent < 25% (male) or < 35% (female). |
|
| Normal-weight obesity | Experimental | Individuals with normal-weight obesity will be defined as having normal BMI (18.5 - 24.9 kg/m2), body fat percent > 25% (male) or > 35% (female). |
|
| Overt obesity and high body fat percent | Active Comparator | Overt obesity (BMI > 30 kg/m2) with high body fat percent (> 25% [male] or > 35% [female]) will be used as a high-risk comparator group. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Exercise tests (VO2 max test and 45-minute exercise session at 65% VO2 max) | Other | All participants will complete two exercise sessions:
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| Measure | Description | Time Frame |
|---|---|---|
| Serum concentrations of FABP2 following short, intense exercise | The investigators will examine peak and absolute change in this indicator of gut permeability after the VO2 max test on a cycle ergometer. | Approximately 8 months |
| Serum concentrations of LBP following short, intense exercise | The investigators will examine peak and absolute change in this indicator of gut permeability after the VO2 max test on a cycle ergometer. | Approximately 8 months |
| Serum concentrations of sCD14 following short, intense exercise | The investigators will examine peak and absolute change in this indicator of gut permeability after the VO2 max test on a cycle ergometer. | Approximately 8 months |
| Serum concentrations of FABP2 following sustained, moderate exercise | The investigators will examine peak and absolute change in this indicator of gut permeability after 45-minutes of exercise at 65% VO2 max on a cycle ergometer. | Approximately 8 months |
| Serum concentrations of IL-6 following sustained, moderate exercise | The investigators will examine peak and absolute change in this inflammatory marker after 45-minutes of exercise at 65% VO2 max on a cycle ergometer. | Approximately 8 months |
| Measure | Description | Time Frame |
|---|---|---|
| VO2 Max | The investigators will compare VO2 max after the short, intense exercise session across study groups. | Approximately 8 months |
| Respiratory exchange ratio (RER) during VO2 max test | The investigators will compare RER dynamics during the short, intense exercise session across study groups. |
| Measure | Description | Time Frame |
|---|---|---|
| Body fat percent assessment with dual-energy X-ray absorptiometry (DXA). | The investigators will perform DXA scans on all participants to assess body fat percent. | Approximately 8 months |
| Absolute body fat assessment with dual-energy X-ray absorptiometry (DXA) |
Inclusion Criteria:
Control group: normal BMI, body fat percentage < 25% (male) or < 35% (female)
Normal-weight obesity: normal BMI, body fat percentage > 25% (male) or > 35% (female)
Overt obesity: BMI in obesity range, body fat percentage > 25% (male) or > 35% (female)
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Bryant H Keirns, MS | Contact | 3166891711 | bryant.keirns@okstate.edu | |
| Sam R Emerson, PhD | Contact | 405-744-2303 | sam.emerson@okstate.edu |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| 208 Nancy Randolph Davis, Oklahoma State University | Recruiting | Stillwater | Oklahoma | 74078 | United States |
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| ID | Term |
|---|---|
| D009765 | Obesity |
| ID | Term |
|---|---|
| D050177 | Overweight |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D005080 | Exercise Test |
| ID | Term |
|---|---|
| D006334 | Heart Function Tests |
| D003935 | Diagnostic Techniques, Cardiovascular |
| D019937 | Diagnostic Techniques and Procedures |
| D003933 | Diagnosis |
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Three study groups (n=10/ group):
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| Approximately 8 months |
| Maximum workload during exercise sessions | The investigators will compare workload dynamics in watts during the short, intense and moderate, sustained exercise session across study groups. | Approximately 8 months |
| Heart rate dynamics during exercise sessions | The investigators will compare heart rate dynamics during the short, intense and moderate, sustained exercise session across study groups. | Approximately 8 months |
The investigators will perform DXA scans on all participants to assess absolute body fat in kilograms. |
| Approximately 8 months |
| Lean mass percent assessment with dual-energy X-ray absorptiometry (DXA) | The investigators will perform DXA scans on all participants to assess lean mass percent. | Approximately 8 months |
| Absolute lean mass assessment with dual-energy X-ray absorptiometry (DXA) | The investigators will perform DXA scans on all participants to assess absolute lean mass in kilograms. | Approximately 8 months |
| Absolute visceral fat mass assessment with dual-energy X-ray absorptiometry (DXA) | The investigators will perform DXA scans on all participants to assess absolute visceral mass in grams. | Approximately 8 months |
| Lipid panel with Abbott Piccolo Xpress Clinical Chemistry Analyzer | The investigators will perform a lipid panel on all participants. | Approximately 8 months |
| D001835 |
| Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D012129 | Respiratory Function Tests |
| D003948 | Diagnostic Techniques, Respiratory System |
| D016552 | Ergometry |
| D008919 | Investigative Techniques |