We have a treadmill which I put Ivy on when I'm feeling lazy or when it's raining (I'm a wuss ). You could also teach some tricks or do hide and seek recalls around the house.

Because I'm trying to condition her for agility, we also do Swiss ball exercises, some flatwork, and we're currently working on directionals, which is taking up a lot of time. It doesn't tire her out like a good jog will, but it gets the job done!