Young athletes should build balanced plates," says Katie Jeffrey, MS, RD, CSSD, a registered dietitian, in Stonington, Connecticut. "About 50 to 60 percent of their plate should be composed of carbohydrates such as whole wheat pasta, bread, brown rice or a baked sweet potato. Twenty-five to 30 percent of the plate should be non-starchy vegetables such as lettuce, greens, cabbage, broccoli and carrots. The remaining 15 to 20 percent should be filled with lean protein such as chicken, turkey, eggs, beans, tofu or lean cuts of red meat or pork."