To make the most of carbs when supplies are limited, a combination of glucose and fructose is ideal for exercise performance (ref. 12,14). Fruit is therefore a perfect carbohydrate for the Leangains Method. An apple, pear, or orange are all good standbys, and cheap and practical to boot. More pricey and less practical are berries. But on the flip side, blueberries, strawberries, and raspberries have higher nutrient density and fewer calories.