Hey there friends!
Exhausted does not mean your dog is calm or that they are learning how to choose calm. Over stimulation can give your dog the wrong outcomes. As a professional, working with dogs for too many years I get looks, I am seeing an over abundance of owners over stimulating their dogs, instead of focusing on their real basic needs. You do not want to create a dog that becomes adrenalized. This can lead to side effect behaviours that make your dog feel out of sorts and spill into everyday life and interactions.
Mental activities and those activities that are genetic to you dog is what is going to give them mental and physical satisfaction.
Things like sniffing, digging, foraging for food, licking, ripping things apart looking for food, carrying toys ( not just bringing back), very short sprints, learning new puzzles or training games that will give their brains a work out . And the end all, trust centred handling and low pressure interactions where you and your dog can have a easy and heart felt interaction.