- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03524690
Effects of Severe Negative Energy Balance on Inflammation
Effects of Severe Negative Energy Balance on Inflammation During a Simulated Military Operation
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Endurance exercise elicits skeletal muscle and systemic inflammation. Inflammation in response to endurance exercise is normally attenuated with adequate rest and recovery as skeletal muscle adapts with training. However, performing repeated bouts of prolonged and unaccustomed, muscle damaging (i.e., eccentric loading) endurance exercise may be detrimental to performance and limit the adaptive responses to exercise by diminishing the absorption of key nutrients. Warfighters are commonly exposed to such exercise bouts during sustained training and combat operations, the effects of which may be exacerbated by negative energy balance. Therefore, to define the putative role of energy balance on systemic inflammation, we will conduct a controlled laboratory study that simulates the physiological stressors imposed during sustained military training and combat operations to determine if systemic inflammation is exacerbated by underfeeding.
Twenty-six male, non-obese (body mass index 19.9-29.9 kg/m2), physically active adults will be recruited to participate in a 32 d, longitudinal study. The study is comprised of four sequential phases: 1) a 96 h testing period, 2) a 7 day recovery period (Recovery 1), 3) a second, 96 h testing period, and 4) a 14 d recovery period (Recovery 2). During testing, subjects will be randomized to consume either sufficient food (combat rations) to maintain energy balance or will be provided a restricted amount of food to elicit severe negative energy balance. Mineral absorption studies and will be conducted during each testing condition, energy balance and energy negative balance. This design will test the hypothesis that maintaining energy balance will attenuate systemic inflammation and its potential negative effects on whole-body metabolic homeostasis in response to physiological stressors.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
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Massachusetts
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Natick, Massachusetts, United States, 01760
- US Army Research Institute of Environmental Medicine
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Men who are active duty military, aged 18 - 39 years
- Weight stable in the past 2 months (± 2.27 kg)
- Healthy without evidence of chronic illness, medication use, or musculoskeletal injury as determined by the USARIEM Office of Medical Support and Oversight (OMSO)
- Recreationally active (2-4 days per week aerobic and/or resistance exercise)
- Refrain from taking any pain-relievers (e.g., acetaminophen), nonsteroidal anti-inflammatory drugs (e.g., aspirin, Advil®, Aleve®, Naprosyn®), or any other aspirin-containing product for 10 days before starting and at least 5 days after completing the study
- Refrain from the use of alcohol and nicotine for the duration of the study
- Willing to refrain from alcohol, smoking any nicotine product (includes e-cigarettes), vaping, chewing tobacco, caffeine, and dietary supplement use, and from consumption of probiotic-containing foods (e.g., yogurt) throughout the entire study period (vitamin/mineral supplements cannot be taken for at least 2 weeks before starting the study)
- Supervisor approval for non-HRV Active Duty Military working within the US Army Natick Soldier Systems Center
- Reports having a bowel movement at least as frequently as every-other-day
Exclusion Criteria:
- Musculoskeletal injuries that compromise exercise capability
- Metabolic or cardiovascular abnormalities (e.g., kidney disease, diabetes, cardiovascular disease, etc.)
- History of any disease or abnormality of the gastrointestinal tract including (but not limited to) diverticulosis, diverticulitis and inflammatory bowel disease, peptic ulcer disease, Crohn's disease, ulcerative colitis; or previous gastrointestinal surgery
- Anemic (plasma ferritin < 40 µg/L, hemoglobin < 13 g/dL) and Sickle Cell Anemia/Trait
- C-reactive protein (CRP) > 5 mg/dL
- Abnormal PT/PTT test or problems with blood clotting
- History of complications with lidocaine
- Evidence of any physical, mental, and/or medical conditions that would make the proposed studies relatively more hazardous as determined by OMSO
- Present condition of alcoholism or other substance abuse issues; use of anabolic steroids
- Blood donation within 4 months of beginning the study
- Oral antibiotic use within 3 months of participation
- Colonoscopy within 3 months of participation
- Use of laxatives, stool softeners, or anti-diarrheal medications more than once/month
- Currently using benzodiazepines, anti-depressants or anti-histamines
- Pacemaker or other implanted electronic medical device
- Are unwilling or unable to eat study diets and foods provided and/or follow exercise prescriptions
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: SUSOPS Balance
Volunteers provided sufficient food to maintain energy balance.
|
Energy Balance Sufficient food provided to maintain energy balance.
|
Experimental: SUSOPS Negative Balance
Volunteers provided insufficient food to maintain energy balance resulting in negative energy balance.
|
Negative Energy Balance Insufficient food provided to maintain energy balance resulting in negative energy balance.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The effects of a simulated military operation on systemic inflammation
Time Frame: 6 hour measure
|
Assessed using blood assays.
|
6 hour measure
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The effects of energy balance and severe energy deficit on inflammation during a simulated military operation
Time Frame: 6 hour measure
|
Assessed using mineral absorption from stable isotopes.
|
6 hour measure
|
Collaborators and Investigators
Investigators
- Principal Investigator: Stefan M Pasiakos, PhD, Military Nutrition Division, USARIEM
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
Additional Relevant MeSH Terms
Other Study ID Numbers
- 18-06HC
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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