How to wear out a puppy

In addition to daily walks and dog park visits, we hit upon a great way to get exercise in for our pups.

It involves me standing at the top of the hill and my wife at the bottom, and taking turns calling out for the dogs to come and run to us. 

They usually give chase and run back and forth.  After this, they get really tired and then are angels behavior-wise on the walk home and at home.