Fancy word and terminology for "eat based on what you do." As an active person, consuming small portions of carbs throughout the day and fats later in the evening can be very effective for building muscle and keeping off fat. But if you’re slowed down (or sitting in an office chair for eight-plus hours per day), it’s recommended to slash back on both of those particular macronutrients in small increments, but do it slowly so you don't get cravings the first week of trying it out. Eventually you’ll find the balance.
(Secret trick: Swap out the morning oatmeal for wheat puffs to drop your carbs by 30-40%)