The most important thing in my job is to make the dogs that accompany me happy. As a studied animal psychologist I know about the needs of a dog.
Jump and run is not only fun for them, it gets them into a natural state of being. They get physical exercise and simultaneously mental stimulation as well. See Toto in the first pic? That's what you get!
A dogs body is designed to handle off road terrain. Of course you have to evaluate the overall health of your dog first, before overdoing it. But even if they don't climb steep hills, a little off road is possible for everyone.
My old Labrador lady Emmi (13) is keeping up with the youngsters pretty good. She loves her water and to see her enjoy herself at that age is heart warming. Look at her climbing the cliff lol.
Now taking pics of dogs in action is not so easy, especially when you're only equipped with a smartphone. Still I hope you have an impression of how important jumping and running is for your dog. And when a treat comes flying from a rock, the Rottie will love you even more ;)
See you in the pack!