Something as simple as an hour long road trip is often enough to break up the monotony of the day and get your dog out in the fresh air. If your dog rides in a crate in the car be sure to roll the windows down so they can feel the wind blowing into the vehicle. Some dogs are held in the seat with a specialized leash that is like a car seat or a safety harness for an auto.
As the owner of a high strung Spanish Water Dog you should never underestimate the magic of a dog park. Most canines love to run free and socialize at such locations. Your pooch will be able to get ample exercise, soak up some sun, meet other dogs, and maybe even play a few games of fetch with you. Most towns and cities have fully fenced in dog parks where your pooch can enjoy true freedom in an open outdoor setting. Dog parks are a great way to exercise a large, rambunctious dog like the Spanish Water Dog.