Eligibility Module
The Eligibility Module contains detailed information about who can participate in the clinical trial. This includes eligibility criteria, age restrictions, gender requirements, healthy volunteer status, and study population descriptions, helping researchers understand who is eligible to participate in the study.
Eligibility Module path is as follows:
Study -> Protocol Section -> Eligibility Module
Eligibility Module
Ignite Creation Date:
2025-12-24 @ 4:41 PM
Ignite Modification Date:
2025-12-24 @ 4:41 PM
NCT ID:
NCT02731066
Eligibility Criteria:
Inclusion Criteria:
* Born at altitudes less than 2,100 m (\~7,000 feet)
* Physically active based on assessment of physical activity history (2-4 days per week aerobic and/or resistance exercise)
* Body weight ≥ 110 lbs.
* Body mass index (BMI) between 18.5-29.9 kg/m2
* Females must be on contraception (e.g., oral birth control, NuvaRing®, Depo Provera®, etc.)
* Have supervisor approval (permanent party military)
* Not taking any medications and/or willing to refrain from all medication use 4 wk prior to and throughout the entire study period, unless provided/approved by the US Army Research Institute of Environmental Medicine (USARIEM) Office of Medical Support and Oversight (OMSO) or medical oversight at Pikes Peak, Colorado organized through OMSO.
* Willing to refrain from alcohol, smoking any nicotine product (includes e-cigarettes), electronic cigarettes, chewing tobacco, caffeine, and dietary supplement use throughout the entire study period
* Willing to travel to USARIEM's Altitude Laboratory at Pikes Peak and live there for 22 consecutive days
* Refrain from taking any nonsteroidal anti-inflammatory drugs (NSAIDs; e.g. aspirin, Advil®, Aleve®, Naprosyn®, or any aspirin-containing product) for 10 days before and at least 5 days AFTER each muscle biopsy. (\*Tylenol® or acetaminophen is ok to use if needed for discomfort)
Exclusion Criteria:
* Born at altitudes greater than 2,100 m (\~7,000 feet)
* Living in areas that are more than 1,200 m (\~4,000 feet), or have traveled to areas that are more than 1,200 m for five days or more within the last 2 mo
* Musculoskeletal injuries that compromise exercise capability
* Metabolic or cardiovascular abnormalities, gastrointestinal disorders (e.g., kidney disease, diabetes, cardiovascular disease, etc.)
* Disease or medication that affects macronutrient metabolism and/or the ability to participate in strenuous exercise
* Evidence of apnea or other sleeping disorders
* Evidence of prior high altitude pulmonary edema or high altitude cerebral edema diagnosis
* Allergies or intolerance to foods (including but not limited to lactose intolerance/milk allergy), vegetarian practices, or medications (including, but not limited to, lidocaine or phenylalanine) to be utilized in the study
* History of complications with lidocaine
* Taking medications that interfere with oxygen delivery and transport (Includes sedatives, sleeping aids, tranquilizers and/or any medication that depresses ventilation, diuretics, alpha and beta blockers)
* 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, anabolic steroids, or other substance abuse issues
* Anemia (hematocrit \<38% for males, \<36% for females, and hemoglobin \>12.5 g/dL for all subjects) or Sickle Cell Anemia/Trait
* Abnormal prothrombin time/partial thromboplastin time (PT/PTT) test or problems with blood clotting
* Blood donation within 8 weeks of beginning the study
* Pregnancy and women not on contraceptives
* Any use of antibiotics, except topical antibiotics, within 3 months of study participation.
* Colonoscopy within 3 months of study participation
* Use of laxatives, stool softeners, or anti-diarrheal medications at least once a week.
Healthy Volunteers:
True
Sex:
ALL
Minimum Age:
18 Years
Maximum Age:
42 Years
Study:
NCT02731066
Study Brief:
Protocol Section:
NCT02731066