Protein and carbohydrates should be eaten after diet practice, which belongs to supper and vegetables after practice. ZMA has no obvious effect. Don't waste any more money on it. Just make sure that protein is fully replenished. Weight per kilogram per day 1.5g, including protein, an animal in daily diet. More need to add enough protein to reduce fat.
I won't mention the rest. From the point of view described later, excessive exercise intensity, insufficient diet and insufficient rest should be the main influences. Correct these points.