If you get regular cardiovascular exercise or train for an endurance sport, you need more daily carbs to fuel your workouts and replenish your energy stores.Remember:::—> All carbs are not created equal. Grains, fruit, vegetables (nutrient-rich choices) as well as candy and sweets (empty calories) are all sources of carbohydrate. *The best carbs to choose are ones that contribute plenty of other nutrients such as protein, vitamins, fiber, and antioxidants.