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NCT07489690 · ClinicalTrials.gov registry record · NA
Energy Dense Fueling for Cold-Weather Operations
A NA study, sponsored by United States Army Research Institute of Environmental Medicine.
- Recruiting
- Registry status
- NA
- Development phase
- 8
- Enrollment target
NCT07489690: Recruiting NA study, sponsored by United States Army Research Institute of Environmental Medicine.
NCT07489690 is a NA study that is actively recruiting participants, run by United States Army Research Institute of Environmental Medicine. The registered enrollment target is 8 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT07489690, a NA study, is actively recruiting participants, sponsored by United States Army Research Institute of Environmental Medicine.
- RECRUITING
- Registry status
- NA
- Development phase
- 8 participants
- Enrollment target
Study Summary
High daily energy expenditures without compensatory increases in energy intakes results in severe energy deficits during cold-weather military operations. Observational and experimental data from our laboratory suggests that consuming higher-fat, energy dense products can increase energy intake and attenuate energy deficits, however, laboratory analysis is needed to understand the impact of macronutrient manipulation on substrate oxidation and aerobic performance. This proof of concept, randomized crossover study will examine the effects of consuming an isocaloric bar (approximately 350 kcal) that is higher in carbohydrate (CHO: 50% carbohydrate, 30% fat, 20% protein) or higher in fat (FAT: 30% carbohydrate, 50% fat, 20% protein) on substrate oxidation and aerobic performance (time trial) during acute cold (5°C) exposure. Volunteers will wear shorts and a t-shirt during cold exposure, with continuous monitoring of core and skin temperatures. Baseline data will be collected on volunteer height, weight, body composition, and V̇O2peak. To ensure volunteers are familiar with exercise protocols, they will complete practice sessions of all exercise before the start of data collection. Exercise and diet will be controlled throughout data collection. 24 hours prior to data collection, volunteers will consume a lead-in study diet and will abstain from exercise. After 24 hours, volunteers will return to the laboratory for assessment of substrate oxidation and aerobic performance. Volunteers will consume the CHO or FAT treatment bars under cold conditions, followed by 60 minutes of rest prior to the start of exercise. Volunteers will then complete 90 minutes of load carriage steady-state (55 ± 5% VO2peak) treadmill exercise, wearing a ruck with weighing 30% of their total body mass. After steady-state exercise, aerobic performance will be assessed by having volunteers complete a 2-mile time trial. Indirect calorimetry will be used to determine substrate oxidation during steady
Primary Outcome
2 mile time trial run
Interventions
- DIETARY_SUPPLEMENT High Fat
- DIETARY_SUPPLEMENT High Carbohydrate
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 8 participants |
| Start Date | 2026-02-14 |
| Est. Completion | 2026-09-30 |
| Phase | NA |
What NCT07489690 shows while recruiting
NCT07489690 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 8 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower).
The record links to 0 conditions, and to 2 interventions - of which High Fat is the first listed.
NCT07489690 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT07489690 about?
NCT07489690 is a clinical study titled "Energy Dense Fueling for Cold-Weather Operations". High daily energy expenditures without compensatory increases in energy intakes results in severe energy deficits during cold-weather military operations. Observational and experimental data from our laboratory suggests that consuming higher-fat, energy dense products can increase energy intake and ...
What is the current status of trial NCT07489690?
This trial is currently recruiting. It is a NA study. The enrollment target is 8 participants. The study started on 2026-02-14. Estimated completion is 2026-09-30.
What interventions are being tested in trial NCT07489690?
The interventions under investigation include: High Fat (DIETARY_SUPPLEMENT), High Carbohydrate (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT07489690?
This trial is sponsored by United States Army Research Institute of Environmental Medicine, which has 59 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT07489690's enrollment target sits among peer trials
8 1976th of 2000 higher than 19 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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