Tubers aren’t considered strictly paleo, but often people who are extremely active or consider themselves athletes may include them in their diet. Tubers are beneficial to athletes because they have a high Glycemic Index (GI) number, meaning they have a high amount of starch that is converted to sugar once consumed. People who are athletes or very active may choose to consume tubers, which are a complex carbohydrate, after workouts in order to refuel the stores of glycogen and carbohydrates that have been lost. For athletes, an additional 60-100 grams of carbohydrates, per hour of strenuous activity is often necessary to provide the body with the proper nutrition.