fruits are fine in moderation. i stick with in-season berries and stone fruits for the most part, although i do keep frozen berries around during the winter for sweet treats. year-round access to super sweet fruits is a very modern innovation.
the fundamentals of the plan don't change regardless of training. you may simply need more of everything, especially protein, so you don't become depleted. don't be afraid of carbs, especially tubers and root veggies.