There’s surely a period where your body needs protein to repair and build after a muscle-straining workout, particularly something like a max session in the weight room, a CrossFit WOD (workout of the day), or a high-intensity interval session. But it’s not so much an anabolic window, Schoenfeld says, “it’s an anabolic barn door.” As long as you eat breakfast, lunch, and dinner, it’s almost impossible not to get through.