Sure, breed has a lot to do with it.  Border Collies, terriers, Vislas- most “busy” breeds go bonkers if asked to lie around the house and watch TV with you.  But I’ve known too many bulldogs, Newfoundlands, Bassets and Shibas whose pedals are constantly to the metal, all the time.  Their heads simply crave more space. 

After a day of this, he’s calmer, happier, better focused.  It’s not exercise, per say, but exposure to the right dose of space, as defined by the individual dog’s interpretation.