At least start consuming your aminos, shake, carbs, etc. while training.
Exercise depletes your body of all that stuff, and waiting until you’re finished means you’ve been increasingly depleting for the last hour – or however long your workout lasts – before feeding.
That’s why I always take my BCAA’s (or something) before my workout.
I want it to at least be entering my bloodstream by the time I begin training.
Milos is also a big advocate of inter-workout supplementation for similar reasons, and I agree.