I know my Collie never runs out of energy, even when he gets the zoomies outside. When I bought a treadmill, I decided to teach by dog how to use it. He loves every minute he's on the treadmill now and it gives him all the exercise that I wasn't able to give him.
This article, How to Teach Your Dog to Use the Treadmill tells all you need to know about training a dog to use the treadmill. The article gives step by step instructions on how to train a dog on the treadmill.