Many have debated that the “bad carbs”, high in glycemic index, have caused overweight and obesity. However, in terms of using and replenishing energy efficiently for athletic performance, no carbohydrates are bad carbohydrates. When carbohydrates with high glycemic index are consumed, glucose converted from the carbohydrates are pulled into body tissues and used as energy immediately. Therefore, consuming “bad carbs” shortly before, during, and right after (within 45 minutes) training is beneficial. I have avoided high glycemic index carbohydrates in my diet, but I am willing to give “bad carbs” a chance to fuel me up.