Ultra Burn With protein at a fixed level and fat at a fixed low level, the only variable is carbohydrate. Bodybuilding is a specialized sport with very specialized needs. When you are preparing for a contest, performance involves maintaining muscle while minimizing bodyfat. Therefore, as far as the contest diet is concerned: Progressively adjust the amount of calories you consume weekly by adjusting the calorie levels of the carbohydrate you eat while you still fuel your workouts and supply your body's basic needs.