If you live nearby the area, Civic Center is a cool place to get a nice cardio. You can jog or walk around and you are surrounded with beautiful scenery. Inside the Civic Center Plaza, there is a nice fountain with a few, really, cool duck family. The park here has a nice lush, green grass with a cool rolling hill like. There was a festival happening during my visit, and seemed like the whole town gets really involved. This is a definite place to visit during your stay in Scottsdale.
Until then, Cheers! :p