Mistake #2: Inadequate calorie intake during training. I see triathletes make this mistake repeatedly, either to “save calories in an attempt to drop a few pounds,” or to “practice going on empty.” Studies show both mind-sets are completely backward. Take in 30–60 grams of carbs/hour (up to 80–90 grams/hour for Ironman athletes) to fuel your hardworking muscles and maximize your workout effort. Want to practice mental toughness? Do one of your 100-mile rides solo or train in less-than-ideal weather—don’t train on empty. Bonus: Adequately fueling during training will also curb your hunger later, which translates to calories saved at the end of your day—a much smarter way to drop a body fat percentage point or two!