Cold Environments

It is considered cold if the air temperature is below 15° F and the wind speed is greater than 25 m.p.h, or the water temperature is below 64oF. Cold environments increase energy metabolism and urination.

Soldiers can progressively lose weight when conducting field exercises in the cold for two to three weeks. Because this weight loss can cause fatigue and performance decrements, energy intake must increase to meet the increased energy demands. Energy requirements can increase 25 to 50% in the cold. To meet the increased energy and fluid needs, follow the guidelines on page 73. Also,

vitamin and mineral needs may increase, so eat all ration components to meet these needs.

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