There's an adage that strength gains aren't made in the gym; they're made during the recovery from workouts when muscles repair and rebuild (making you "better, stronger, faster..."). This has led (not "lead" ... words have meaning!) to the concept of the "off" day or "rest" day.
We can do better. "Recovery" day is a start. Or how about "muscle repair" day? That can change the way we approach our training schedule.