This picture is for athletes during their season when they need to perform at their peak. Moderate training days are generally described as higher intensity training that lasts for 60 minutes or less, lower intensity activity that lasts 90 minutes or less, or two training sessions in one day with both training sessions being of easy to moderate intensity and lasting less than 1 hour. For instance, an easy aerobic session in the morning and a 30 minute strength session in the evening.
Keep in mind this plate method is useful for meals, but athletes who are training moderate to hard need to be eating more frequently than three meals per day. An example of an athlete's meal plan would include breakfast, train/exercise, eat a post exercise snack or meal, eat lunch, have a mid-afternoon snack, train/exercise, then have dinner post exercise. The plate can also be used to help athletes determine the entire days worth of fuel. I often ask athletes if they put their entire days worth of food on a giant plate, would it look something like what is pictured?