High-energy diet test for cold-weather military operations

This study tests whether brief, repeated exposure to cold can increase your body's 'brown fat,' a type of fat that burns energy and may help with metabolism. Healthy volunteers will undergo controlled cooling sessions and imaging scans to measure changes in their brown fat activity.

This study tests whether omega-3 (fish oil–type) changes how your body fat responds when you are exposed to cold. It may help researchers understand how to regulate “brown fat,” which can be involved in how your body uses energy during cold.

This study looks at how different types of long-term birth control affect iron levels and how your body handles extreme conditions like high altitude or temperature changes. You will exercise in a small altitude room for about 6 hours to help researchers understand these effects.

This trial studies how repeated stress and limited recovery affect your body's resilience. You'll follow a controlled diet and exercise plan to see how well you bounce back.

This study looks at how your body's ability to burn fat during exercise changes when you are exposed to cold, and whether men and women respond differently. You will do two exercise tests in a cold room, and researchers will measure your fat burning.

This study looks at how eating more calories affects your body’s natural heat production and total energy use over a full day. It may help researchers better understand how the body manages weight and energy.