To maintain their energy they must eat more than two pounds of food a day. However, what these explorers eat is as important as how much they eat. Their ability to perform and think clearly depends on proper diet. If nutrition and energy needs are not met, an explorer can suffer fatigue syndrome , a condition that causes dizziness and violent mood swings. Explorers also need water for drinking and food preparation.
Dehydration is a danger during their long hours of physical exertion.
An endurance diet can provide the energy and nutrients necessary for peak performance in the Arctic. That's because fat is a concentrated energy source that supplies nine calories per gram. Carbohydrates and protein , on the other hand, provide four calories per gram each. But consuming fat does not allow the body quick access to calories. Current thinking favors a diet low in fat and high in carbohydrates.