"How would you train a panther to be fit? Not on a treadmill. - Erwan Le Corre

No jump is good if the landing is bad.

You never see your dog running nonstop around and around in a circle for an hour. If he did, you'd think there was something wrong with him. Instead, he'll chase something, roll around, sprint, rest, mix things up. Animal play has a purpose, and it's not hard to surmise that human play should as well.

You can never master the context where you physically and mentally operate; you can only learn to master how you will operate through it.