On days of rest, the explorers will stock up on carbohydrates to replenish their muscle reserves of glycogen. A carbohydrate-rich diet does have drawbacks. Because it takes about twice the amount of carbohydrates to provide the same number of calories found in fat, the sleds must carry heavier loads. The explorers also must prepare more food and eat more often to refuel their bodies, requiring additional time and cooking fuel. The body can store unlimited amounts of fat, but it takes more time to turn it into energy than to access energy in glycogen stored in muscles.
Protein helps muscles grow and repair and it provides energy and heat.
The complete wilderness training book. Breakfast of champions. Hike farther, faster. Scott Tinley's winning guide to sports endurance. Each food you eat provides its own set of nutrients and calories.