Procedural memory is discovered when motorically engaged with the activity.

“Procedural memory is different from semantic or episodic memory. If I asked you, do you know your address? Yes, you can recall your address just sitting there. But if you had had a micro stroke that neatly dissected out your ability to ride a bike and left everything else intact, you might think you could ride a bike. But suddenly, you stand up next to one. And you have no idea what to do with it. And that would be a discovery that would only happen if you were motorically engaged with that object.”