Carbohydrates play a critical role in pre-workout nutrition, serving as the body's primary energy source. Consuming carbs before exercise helps increase glycogen stores, which can improve performance and endurance during both aerobic and anaerobic activities. Ideal choices include complex carbohydrates like whole grain bread, oatmeal, or fruits, which provide a steady release of energy. Timing is also crucial; consuming carbohydrates 30 to 60 minutes before exercise can optimize energy availability. This preload of carbs helps maintain stamina, allowing for a more productive workout and improved overall fitness results.