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Performance nutrition for cold-weather military operations
Lee M Margolis1, Stefan M Pasiakos2
1Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA, USA.
International Journal of Circumpolar Health
|March 19, 2023
Summary
High energy expenditure in cold weather causes severe energy deficits. Increasing dietary fat intake helps soldiers maintain body mass, reduce inflammation, and sustain performance during cold-weather operations.
Area of Science:
- Human physiology
- Nutritional science
- Military medicine
Background:
- Cold-weather military operations involve high energy expenditure, leading to significant energy deficits.
- These energy deficits are associated with detrimental physiological effects, including body mass loss, negative protein balance, hormonal suppression, increased inflammation, and reduced physical performance.
- Current food availability strategies do not sufficiently mitigate these energy deficits.
Purpose of the Study:
- To investigate the role of dietary fat in mitigating energy deficits during cold-weather military operations.
- To determine if increasing energy density through higher fat intake can improve physiological markers and performance.
Main Methods:
- Observational study analyzing energy intake, expenditure, and macronutrient composition in soldiers during cold-weather operations.
- Correlation analysis to assess the relationship between fat intake and energy deficits, body mass changes, inflammation markers, and protein balance.
- Comparison of physiological outcomes between soldiers with higher versus lower fat consumption.
Main Results:
- Higher self-selected fat intake was strongly correlated with increased energy intake and reduced energy deficits.
- Soldiers consuming more fat experienced less body mass loss, lower systemic inflammation, and maintained better net protein balance.
- Fat intake emerged as the primary macronutrient driver for increased energy consumption and mitigation of negative physiological consequences.
Conclusions:
- Increasing dietary fat content in rations is a viable nutritional intervention to increase energy density and intake during cold-weather operations.
- Higher fat consumption can effectively mitigate the negative physiological impacts of energy deficits, such as body mass loss and inflammation.
- Dietary fat interventions may be crucial for sustaining physical performance and soldier health in demanding cold-weather environments.
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