For a guy with a bad knee and overpronation problems, I should know better than to walk around the neighborhood for an hour, lugging a small, wriggling child and sporting poorly-structured/supported shoes. But because I'm a moron, that's exactly what I did yesterday afternoon.
And this morning, I got up bright and early to jump around my garage for an hour. Super-smart. My knee's already aching. Thanks, Plyo.